Resultat de la compression du code CSS de www.kaffee-team.net

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Code CSS comprimé:

<PUBLIC:COMPONENT lightWeight="true">
    <PUBLIC:ATTACH EVENT="oncontentready" FOR="element" ONEVENT="init()" />
    <PUBLIC:ATTACH EVENT="ondocumentready" FOR="element" ONEVENT="init()" />
    <PUBLIC:ATTACH EVENT="ondetach" FOR="element" ONEVENT="cleanup()" />

if( !PIE ) {
    PIE = window['PIE'] = {
        CSS_PREFIX: '-pie-',
        STYLE_PREFIX: 'Pie',
        CLASS_PREFIX: 'pie_'
    };

// Force the background cache to be used. No reason it shouldn't be.
    doc.execCommand( 'BackgroundImageCache', false, true );

/*
     * IE version detection approach by James Padolsey, with modifications -- from
     * http://james.padolsey.com/javascript/detect-ie-in-js-using-conditional-comments/
     */
    PIE.ieVersion = function(){
        var v = 4,
            div = doc.createElement('div'),
            all = div.getElementsByTagName('i');

while (
            div.innerHTML = '',
            all[0]
        ) {}

return v;
    }();

// Detect IE6
    if( PIE.ieVersion === 6 ) {
        // IE6 can't access properties with leading dash, but can without it.
        PIE.CSS_PREFIX = PIE.CSS_PREFIX.replace( /^-/, '' );

// Regex object for removing pie_hover className
        PIE.hoverClassRE = new RegExp( '\b' + PIE.CLASS_PREFIX + 'hover\b', 'g' );
    }

// Detect IE8
    PIE.ie8DocMode = PIE.ieVersion === 8 && doc.documentMode;
/**
 * Utility functions
 */
PIE.Util = {

/**
     * To create a VML element, it must be created by a Document which has the VML
     * namespace set. Unfortunately, if you try to add the namespace programatically
     * into the main document, you will get an "Unspecified error" when trying to
     * access document.namespaces before the document is finished loading. To get
     * around this, we create a DocumentFragment, which in IE land is apparently a
     * full-fledged Document. It allows adding namespaces immediately, so we add the
     * namespace there and then have it create the VML element.
     * @param {string} tag The tag name for the VML element
     * @return {Element} The new VML element
     */
    createVmlElement: function( tag ) {
        var vmlPrefix = 'css3vml',
            vmlDoc = PIE._vmlCreatorDoc;
        if( !vmlDoc ) {
            vmlDoc = PIE._vmlCreatorDoc = doc.createDocumentFragment();
            vmlDoc.namespaces.add( vmlPrefix, 'urn:schemas-microsoft-com:vml' );
        }
        return vmlDoc.createElement( vmlPrefix + ':' + tag );
    },

/**
     * Generate and return a unique ID for a given object. The generated ID is stored
     * as a property of the object for future reuse.
     * @param {Object} obj
     */
    getUID: function( obj ) {
        return obj && obj[ '_pieId' ] || ( obj[ '_pieId' ] = +new Date() + Math.random() );
    },

/**
     * Simple utility for merging objects
     * @param {Object} obj1 The main object into which all others will be merged
     * @param {...Object} var_args Other objects which will be merged into the first, in order
     */
    merge: function( obj1 ) {
        var i, len, p, objN, args = arguments;
        for( i = 1, len = args.length; i < len; i++ ) {
            objN = args[i];
            for( p in objN ) {
                if( objN.hasOwnProperty( p ) ) {
                    obj1[ p ] = objN[ p ];
                }
            }
        }
        return obj1;
    },

/**
     * Execute a callback function, passing it the dimensions of a given image once
     * they are known.
     * @param {string} src The source URL of the image
     * @param {function({w:number, h:number})} func The callback function to be called once the image dimensions are known
     * @param {Object} ctx A context object which will be used as the 'this' value within the executed callback function
     */
    withImageSize: function( src, func, ctx ) {
        var sizes = PIE._imgSizes || ( PIE._imgSizes = {} ),
            size = sizes[ src ], img;
        if( size ) {
            func.call( ctx, size );
        } else {
            img = new Image();
            img.onload = function() {
                size = sizes[ src ] = { w: img.width, h: img.height };
                func.call( ctx, size );
                img.onload = null;
            };
            img.src = src;
        }
    }
};/**
 * 
 */
PIE.Observable = function() {
    /**
     * List of registered observer functions
     */
    this.observers = [];

/**
     * Hash of function ids to their position in the observers list, for fast lookup
     */
    this.indexes = {};
};
PIE.Observable.prototype = {

observe: function( fn ) {
        var id = PIE.Util.getUID( fn ),
            indexes = this.indexes,
            observers = this.observers;
        if( !( id in indexes ) ) {
            indexes[ id ] = observers.length;
            observers.push( fn );
        }
    },

unobserve: function( fn ) {
        var id = PIE.Util.getUID( fn ),
            indexes = this.indexes;
        if( id && id in indexes ) {
            delete this.observers[ indexes[ id ] ];
            delete indexes[ id ];
        }
    },

fire: function() {
        var o = this.observers,
            i = o.length;
        while( i-- ) {
            o[ i ] && o[ i ]();
        }
    }

};/*
 * Set up polling for IE8 - this is a brute-force workaround for syncing issues caused by IE8 not
 * always firing the onmove and onresize events when elements are moved or resized. We check a few
 * times every second to make sure the elements have the correct position and size.
 */

if( PIE.ie8DocMode === 8 ) {
    PIE.Heartbeat = new PIE.Observable();
    setInterval( function() { PIE.Heartbeat.fire() }, 250 );
}
/**
 * Create a single observable listener for scroll events. Used for lazy loading based
 * on the viewport, and for fixed position backgrounds.
 */
PIE.OnScroll = new PIE.Observable();
window.attachEvent( 'onscroll', function() { PIE.OnScroll.fire(); } );
window.attachEvent( 'onresize', function() { PIE.OnScroll.fire(); } );
/**
 * Create a single observable listener for window resize events.
 */
PIE.OnResize = new PIE.Observable();
window.attachEvent( 'onresize', function() { PIE.OnResize.fire(); } );
/**
 * Wrapper for length and percentage style values
 * @constructor
 * @param {string} val The CSS string representing the length. It is assumed that this will already have
 *                 been validated as a valid length or percentage syntax.
 */
PIE.Length = (function() {

var lengthCalcEl = doc.createElement( 'length-calc' ),
        s = lengthCalcEl.style,
        numCache = {},
        unitCache = {};
    s.position = 'absolute';
    s.top = s.left = -9999;

function Length( val ) {
        this.val = val;
    }

Length.prototype = {
        /**
         * Regular expression for matching the length unit
         * @private
         */
        unitRE: /(px|em|ex|mm|cm|in|pt|pc|%)$/,

/**
         * Get the numeric value of the length
         * @return {number} The value
         */
        getNumber: function() {
            var num = numCache[ this.val ],
                UNDEF;
            if( num === UNDEF ) {
                num = numCache[ this.val ] = parseFloat( this.val );
            }
            return num;
        },

/**
         * Get the unit of the length
         * @return {string} The unit
         */
        getUnit: function() {
            var unit = unitCache[ this.val ], m;
            if( !unit ) {
                m = this.val.match( this.unitRE );
                unit = unitCache[ this.val ] = ( m && m[0] ) || 'px';
            }
            return unit;
        },

/**
         * Determine whether this is a percentage length value
         * @return {boolean}
         */
        isPercentage: function() {
            return this.getUnit() === '%';
        },

/**
         * Resolve this length into a number of pixels.
         * @param {Element} el - the context element, used to resolve font-relative values
         * @param {(function():number|number)=} pct100 - the number of pixels that equal a 100% percentage. This can be either a number or a
         *                  function which will be called to return the number.
         */
        pixels: function( el, pct100 ) {
            var num = this.getNumber(),
                unit = this.getUnit();
            switch( unit ) {
                case "px":
                    return num;
                case "%":
                    return num * ( typeof pct100 === 'function' ? pct100() : pct100 ) / 100;
                case "em":
                    return num * this.getEmPixels( el );
                case "ex":
                    return num * this.getEmPixels( el ) / 2;
                default:
                    return num * Length.conversions[ unit ];
            }
        },

/**
         * The em and ex units are relative to the font-size of the current element,
         * however if the font-size is set using non-pixel units then we get that value
         * rather than a pixel conversion. To get around this, we keep a floating element
         * with width:1em which we insert into the target element and then read its offsetWidth.
         * But if the font-size *is* specified in pixels, then we use that directly to avoid
         * the expensive DOM manipulation.
         * @param el
         */
        getEmPixels: function( el ) {
            var fs = el.currentStyle.fontSize,
                px;

if( fs.indexOf( 'px' ) > 0 ) {
                return parseFloat( fs );
            } else {
                lengthCalcEl.style.width = '1em';
                el.appendChild( lengthCalcEl );
                px = lengthCalcEl.offsetWidth;
                el.removeChild( lengthCalcEl );
                return px;
            }
        }
    };

Length.conversions = (function() {
        var units = [ 'mm', 'cm', 'in', 'pt', 'pc' ],
            vals = {},
            parent = doc.documentElement,
            i = units.length, unit;

parent.appendChild( lengthCalcEl );
        while( i-- ) {
            unit = units[i];
            lengthCalcEl.style.width = '100' + unit;
            vals[ unit ] = lengthCalcEl.offsetWidth / 100;
        }
        parent.removeChild( lengthCalcEl );
        return vals;
    })();

Length.ZERO = new Length( '0' );

return Length;
})();
/**
 * Wrapper for a CSS3 bg-position value. Takes up to 2 position keywords and 2 lengths/percentages.
 * @constructor
 * @param {Array.<PIE.Tokenizer.Token>} tokens The tokens making up the background position value.
 */
PIE.BgPosition = (function() {

var length_fifty = new PIE.Length( '50%' ),
        vert_idents = { 'top': 1, 'center': 1, 'bottom': 1 },
        horiz_idents = { 'left': 1, 'center': 1, 'right': 1 };

function BgPosition( tokens ) {
        this.tokens = tokens;
    }
    BgPosition.prototype = {
        /**
         * Normalize the values into the form:
         * [ xOffsetSide, xOffsetLength, yOffsetSide, yOffsetLength ]
         * where: xOffsetSide is either 'left' or 'right',
         *        yOffsetSide is either 'top' or 'bottom',
         *        and x/yOffsetLength are both PIE.Length objects.
         * @return {Array}
         */
        getValues: function() {
            if( !this._values ) {
                var tokens = this.tokens,
                    len = tokens.length,
                    identType = PIE.Tokenizer.Type,
                    length_zero = PIE.Length.ZERO,
                    type_ident = identType.IDENT,
                    type_length = identType.LENGTH,
                    type_percent = identType.PERCENT,
                    type, value,
                    vals = [ 'left', length_zero, 'top', length_zero ];

// If only one value, the second is assumed to be 'center'
                if( len === 1 ) {
                    tokens.push( { type: type_ident, value: 'center' } );
                    len++;
                }

// Two values - CSS2
                if( len === 2 ) {
                    // If both idents, they can appear in either order, so switch them if needed
                    if( type_ident & ( tokens[0].type | tokens[1].type ) &&
                        tokens[0].value in vert_idents && tokens[1].value in horiz_idents ) {
                        tokens.push( tokens.shift() );
                    }
                    if( tokens[0].type & type_ident ) {
                        if( tokens[0].value === 'center' ) {
                            vals[1] = length_fifty;
                        } else {
                            vals[0] = tokens[0].value;
                        }
                    }
                    else if( tokens[0].isLengthOrPercent() ) {
                        vals[1] = new PIE.Length( tokens[0].value );
                    }
                    if( tokens[1].type & type_ident ) {
                        if( tokens[1].value === 'center' ) {
                            vals[3] = length_fifty;
                        } else {
                            vals[2] = tokens[1].value;
                        }
                    }
                    else if( tokens[1].isLengthOrPercent() ) {
                        vals[3] = new PIE.Length( tokens[1].value );
                    }
                }

// Three or four values - CSS3
                else {
                    // TODO
                }

this._values = vals;
            }
            return this._values;
        },

/**
         * Find the coordinates of the background image from the upper-left corner of the background area.
         * Note that these coordinate values are not rounded.
         * @param {Element} el
         * @param {number} width - the width for percentages (background area width minus image width)
         * @param {number} height - the height for percentages (background area height minus image height)
         * @return {Object} { x: Number, y: Number }
         */
        coords: function( el, width, height ) {
            var vals = this.getValues(),
                pxX = vals[1].pixels( el, width ),
                pxY = vals[3].pixels( el, height );

return {
                x: vals[0] === 'right' ? width - pxX : pxX,
                y: vals[2] === 'bottom' ? height - pxY : pxY
            };
        }
    };

return BgPosition;
})();
/**
 * Wrapper for angle values; handles conversion to degrees from all allowed angle units
 * @constructor
 * @param {string} val The raw CSS value for the angle. It is assumed it has been pre-validated.
 */
PIE.Angle = (function() {
    function Angle( val ) {
        this.val = val;
    }
    Angle.prototype = {
        unitRE: /[a-z]+$/i,

/**
         * @return {string} The unit of the angle value
         */
        getUnit: function() {
            return this._unit || ( this._unit = this.val.match( this.unitRE )[0].toLowerCase() );
        },

/**
         * Get the numeric value of the angle in degrees.
         * @return {number} The degrees value
         */
        degrees: function() {
            var deg = this._deg, u, n;
            if( deg === undefined ) {
                u = this.getUnit();
                n = parseFloat( this.val, 10 );
                deg = this._deg = ( u === 'deg' ? n : u === 'rad' ? n / Math.PI * 180 : u === 'grad' ? n / 400 * 360 : u === 'turn' ? n * 360 : 0 );
            }
            return deg;
        }
    };

return Angle;
})();/**
 * Abstraction for colors values. Allows detection of rgba values.
 * @constructor
 * @param {string} val The raw CSS string value for the color
 */
PIE.Color = (function() {
    function Color( val ) {
        this.val = val;
    }

/**
     * Regular expression for matching rgba colors and extracting their components
     * @type {RegExp}
     */
    Color.rgbaRE = /\s*rgba$\s*(\d{1,3})\s*,\s*(\d{1,3})\s*,\s*(\d{1,3})\s*,\s*(\d+|\d*\.\d+)\s*$\s*/;

Color.prototype = {
        /**
         * @private
         */
        parse: function() {
            if( !this._color ) {
                var v = this.val,
                    m = v.match( Color.rgbaRE );
                if( m ) {
                    this._color = 'rgb(' + m[1] + ',' + m[2] + ',' + m[3] + ')';
                    this._alpha = parseFloat( m[4] );
                } else {
                    this._color = v;
                    this._alpha = ( v === 'transparent' ? 0 : 1 );
                }
            }
        },

/**
         * Retrieve the value of the color in a format usable by IE natively. This will be the same as
         * the raw input value, except for rgba values which will be converted to an rgb value.
         * @param {Element} el The context element, used to get 'currentColor' keyword value.
         * @return {string} Color value
         */
        value: function( el ) {
            this.parse();
            return this._color === 'currentColor' ? el.currentStyle.color : this._color;
        },

/**
         * Retrieve the alpha value of the color. Will be 1 for all values except for rgba values
         * with an alpha component.
         * @return {number} The alpha value, from 0 to 1.
         */
        alpha: function() {
            this.parse();
            return this._alpha;
        }
    };

return Color;
})();/**
 * A tokenizer for CSS value strings.
 * @constructor
 * @param {string} css The CSS value string
 */
PIE.Tokenizer = (function() {
    function Tokenizer( css ) {
        this.css = css;
        this.ch = 0;
        this.tokens = [];
        this.tokenIndex = 0;
    }

/**
     * Enumeration of token type constants.
     * @enum {number}
     */
    var Type = Tokenizer.Type = {
        ANGLE: 1,
        CHARACTER: 2,
        COLOR: 4,
        DIMEN: 8,
        FUNCTION: 16,
        IDENT: 32,
        LENGTH: 64,
        NUMBER: 128,
        OPERATOR: 256,
        PERCENT: 512,
        STRING: 1024,
        URL: 2048
    };

/**
     * A single token
     * @constructor
     * @param {number} type The type of the token - see PIE.Tokenizer.Type
     * @param {string} value The value of the token
     */
    Tokenizer.Token = function( type, value ) {
        this.type = type;
        this.value = value;
    };
    Tokenizer.Token.prototype = {
        isLength: function() {
            return this.type & Type.LENGTH || ( this.type & Type.NUMBER && this.value === '0' );
        },
        isLengthOrPercent: function() {
            return this.isLength() || this.type & Type.PERCENT;
        }
    };

Tokenizer.prototype = {
        whitespace: /\s/,
        number: /^[\+\-]?(\d*\.)?\d+/,
        url: /^url$\s*("([^"]*)"|'([^']*)'|([!#$%&*-~]*))\s*$/i,
        ident: /^\-?[_a-z][\w-]*/i,
        string: /^("([^"]*)"|'([^']*)')/,
        operator: /^[\/,]/,
        hash: /^#[\w]+/,
        hashColor: /^#([\da-f]{6}|[\da-f]{3})/i,

unitTypes: {
            'px': Type.LENGTH, 'em': Type.LENGTH, 'ex': Type.LENGTH,
            'mm': Type.LENGTH, 'cm': Type.LENGTH, 'in': Type.LENGTH,
            'pt': Type.LENGTH, 'pc': Type.LENGTH,
            'deg': Type.ANGLE, 'rad': Type.ANGLE, 'grad': Type.ANGLE
        },

colorNames: {
            'aqua':1, 'black':1, 'blue':1, 'fuchsia':1, 'gray':1, 'green':1, 'lime':1, 'maroon':1,
            'navy':1, 'olive':1, 'purple':1, 'red':1, 'silver':1, 'teal':1, 'white':1, 'yellow': 1,
            'currentColor': 1
        },

colorFunctions: {
            'rgb': 1, 'rgba': 1, 'hsl': 1, 'hsla': 1
        },

/**
         * Advance to and return the next token in the CSS string. If the end of the CSS string has
         * been reached, null will be returned.
         * @param {boolean} forget - if true, the token will not be stored for the purposes of backtracking with prev().
         * @return {PIE.Tokenizer.Token}
         */
        next: function( forget ) {
            var css, ch, firstChar, match, type, val,
                me = this;

// In case we previously backed up, return the stored token in the next slot
            if( this.tokenIndex < this.tokens.length ) {
                return this.tokens[ this.tokenIndex++ ];
            }

// Move past leading whitespace characters
            while( this.whitespace.test( this.css.charAt( this.ch ) ) ) {
                this.ch++;
            }
            if( this.ch >= this.css.length ) {
                return failure();
            }

ch = this.ch;
            css = this.css.substring( this.ch );
            firstChar = css.charAt( 0 );
            switch( firstChar ) {
                case '#':
                    if( match = css.match( this.hashColor ) ) {
                        this.ch += match[0].length;
                        return newToken( Type.COLOR, match[0] );
                    }
                    break;

case '"':
                case "'":
                    if( match = css.match( this.string ) ) {
                        this.ch += match[0].length;
                        return newToken( Type.STRING, match[2] || match[3] || '' );
                    }
                    break;

case "/":
                case ",":
                    this.ch++;
                    return newToken( Type.OPERATOR, firstChar );

case 'u':
                    if( match = css.match( this.url ) ) {
                        this.ch += match[0].length;
                        return newToken( Type.URL, match[2] || match[3] || match[4] || '' );
                    }
            }

// Numbers and values starting with numbers
            if( match = css.match( this.number ) ) {
                val = match[0];
                this.ch += val.length;

// Check if it is followed by a unit
                if( css.charAt( val.length ) === '%' ) {
                    this.ch++;
                    return newToken( Type.PERCENT, val + '%' );
                }
                if( match = css.substring( val.length ).match( this.ident ) ) {
                    val += match[0];
                    this.ch += match[0].length;
                    return newToken( this.unitTypes[ match[0].toLowerCase() ] || Type.DIMEN, val );
                }

// Plain ol' number
                return newToken( Type.NUMBER, val );
            }

// Identifiers
            if( match = css.match( this.ident ) ) {
                val = match[0];
                this.ch += val.length;

// Named colors
                if( val.toLowerCase() in this.colorNames ) {
                    return newToken( Type.COLOR, val );
                }

// Functions
                if( css.charAt( val.length ) === '(' ) {
                    this.ch++;

// Color values in function format: rgb, rgba, hsl, hsla
                    if( val.toLowerCase() in this.colorFunctions ) {
                        function isNum( tok ) {
                            return tok && tok.type & Type.NUMBER;
                        }
                        function isNumOrPct( tok ) {
                            return tok && ( tok.type & ( Type.NUMBER | Type.PERCENT ) );
                        }
                        function isValue( tok, val ) {
                            return tok && tok.value === val;
                        }
                        function next() {
                            return me.next( 1 );
                        }

if( ( val.charAt(0) === 'r' ? isNumOrPct( next() ) : isNum( next() ) ) &&
                            isValue( next(), ',' ) &&
                            isNumOrPct( next() ) &&
                            isValue( next(), ',' ) &&
                            isNumOrPct( next() ) &&
                            ( val === 'rgb' || val === 'hsa' || (
                                isValue( next(), ',' ) &&
                                isNum( next() )
                            ) ) &&
                            isValue( next(), ')' ) ) {
                            return newToken( Type.COLOR, this.css.substring( ch, this.ch ) );
                        }
                        return failure();
                    }

return newToken( Type.FUNCTION, val + '(' );
                }

// Other identifier
                return newToken( Type.IDENT, val );
            }

// Standalone character
            this.ch++;
            return newToken( Type.CHARACTER, firstChar );
        },

/**
         * Determine whether there is another token
         * @return {boolean}
         */
        hasNext: function() {
            var next = this.next();
            this.prev();
            return !!next;
        },

/**
         * Back up and return the previous token
         * @return {PIE.Tokenizer.Token}
         */
        prev: function() {
            return this.tokens[ this.tokenIndex-- - 2 ];
        },

/**
         * Retrieve all the tokens in the CSS string
         * @return {Array.<PIE.Tokenizer.Token>}
         */
        all: function() {
            while( this.next() ) {}
            return this.tokens;
        },

/**
         * Return a list of tokens from the current position until the given function returns
         * true. The final token will not be included in the list.
         * @param {function():boolean} func - test function
         * @param {boolean} require - if true, then if the end of the CSS string is reached
         *        before the test function returns true, null will be returned instead of the
         *        tokens that have been found so far.
         * @return {Array.<PIE.Tokenizer.Token>}
         */
        until: function( func, require ) {
            var list = [], t, hit;
            while( t = this.next() ) {
                if( func( t ) ) {
                    hit = true;
                    this.prev();
                    break;
                }
                list.push( t );
            }
            return require && !hit ? null : list;
        }
    };

return Tokenizer;
})();/**
 * Handles calculating, caching, and detecting changes to size and position of the element.
 * @constructor
 * @param {Element} el the target element
 */
PIE.BoundsInfo = function( el ) {
    this.targetElement = el;
};
PIE.BoundsInfo.prototype = {

_locked: 0,

positionChanged: function() {
        var last = this._lastBounds,
            bounds;
        return !last || ( ( bounds = this.getBounds() ) && ( last.x !== bounds.x || last.y !== bounds.y ) );
    },

sizeChanged: function() {
        var last = this._lastBounds,
            bounds;
        return !last || ( ( bounds = this.getBounds() ) && ( last.w !== bounds.w || last.h !== bounds.h ) );
    },

getLiveBounds: function() {
        var rect = this.targetElement.getBoundingClientRect();
        return {
            x: rect.left,
            y: rect.top,
            w: rect.right - rect.left,
            h: rect.bottom - rect.top
        };
    },

getBounds: function() {
        return this._locked ? 
                ( this._lockedBounds || ( this._lockedBounds = this.getLiveBounds() ) ) :
                this.getLiveBounds();
    },

hasBeenQueried: function() {
        return !!this._lastBounds;
    },

lock: function() {
        ++this._locked;
    },

unlock: function() {
        if( !--this._locked ) {
            if( this._lockedBounds ) this._lastBounds = this._lockedBounds;
            this._lockedBounds = null;
        }
    }

};
(function() {

PIE.StyleInfoBase = {

_locked: 0,

/**
     * Create a new StyleInfo class, with the standard constructor, and augmented by
     * the StyleInfoBase's members.
     * @param proto
     */
    newStyleInfo: function( proto ) {
        function StyleInfo( el ) {
            this.targetElement = el;
        }
        PIE.Util.merge( StyleInfo.prototype, PIE.StyleInfoBase, proto );
        StyleInfo._propsCache = {};
        return StyleInfo;
    },

/**
     * Get an object representation of the target CSS style, caching it for each unique
     * CSS value string.
     * @return {Object}
     */
    getProps: function() {
        var css = this._lastCss = this.getCss(),
            cache = this.constructor._propsCache;
        return css ? ( css in cache ? cache[ css ] : ( cache[ css ] = this.parseCss( css ) ) ) : null;
    },

/**
     * Get the raw CSS value for the target style
     * @return {string}
     */
    getCss: cacheWhenLocked( function() {
        var el = this.targetElement,
            ctor = this.constructor,
            s = el.style,
            cs = el.currentStyle,
            cssProp = this.cssProperty,
            styleProp = this.styleProperty,
            prefixedCssProp = ctor._prefixedCssProp || ( ctor._prefixedCssProp = PIE.CSS_PREFIX + cssProp ),
            prefixedStyleProp = ctor._prefixedStyleProp || ( ctor._prefixedStyleProp = PIE.STYLE_PREFIX + styleProp.charAt(0).toUpperCase() + styleProp.substring(1) );
        return s[ prefixedStyleProp ] || cs.getAttribute( prefixedCssProp ) || s[ styleProp ] || cs.getAttribute( cssProp );
    } ),

/**
     * Determine whether the target CSS style is active.
     * @return {boolean}
     */
    isActive: cacheWhenLocked( function() {
        return !!this.getProps();
    } ),

/**
     * Determine whether the target CSS style has changed since the last time it was parsed.
     * @return {boolean}
     */
    changed: function() {
        return this._lastCss !== this.getCss();
    },

cacheWhenLocked: cacheWhenLocked,

lock: function() {
        ++this._locked;
    },

unlock: function() {
        if( !--this._locked ) {
            delete this._lockedValues;
        }
    }
};

})();/**
 * Handles parsing, caching, and detecting changes to background (and -pie-background) CSS
 * @constructor
 * @param {Element} el the target element
 */
PIE.BackgroundStyleInfo = PIE.StyleInfoBase.newStyleInfo( {

cssProperty: PIE.CSS_PREFIX + 'background',
    styleProperty: PIE.STYLE_PREFIX + 'Background',

attachIdents: { 'scroll':1, 'fixed':1, 'local':1 },
    repeatIdents: { 'repeat-x':1, 'repeat-y':1, 'repeat':1, 'no-repeat':1 },
    originIdents: { 'padding-box':1, 'border-box':1, 'content-box':1 },
    clipIdents: { 'padding-box':1, 'border-box':1 },
    positionIdents: { 'top':1, 'right':1, 'bottom':1, 'left':1, 'center':1 },
    sizeIdents: { 'contain':1, 'cover':1 },

/**
     * For background styles, we support the -pie-background property but fall back to the standard
     * backround* properties.  The reason we have to use the prefixed version is that IE natively
     * parses the standard properties and if it sees something it doesn't know how to parse, for example
     * multiple values or gradient definitions, it will throw that away and not make it available through
     * currentStyle.
     *
     * Format of return object:
     * {
     *     color: <PIE.Color>,
     *     images: [
     *         {
     *             type: 'image',
     *             url: 'image.png',
     *             repeat: <'no-repeat' | 'repeat-x' | 'repeat-y' | 'repeat'>,
     *             position: <PIE.BgPosition>,
     *             attachment: <'scroll' | 'fixed' | 'local'>,
     *             origin: <'border-box' | 'padding-box' | 'content-box'>,
     *             clip: <'border-box' | 'padding-box'>,
     *             size: <'contain' | 'cover' | { w: <'auto' | PIE.Length>, h: <'auto' | PIE.Length> }>
     *         },
     *         {
     *             type: 'linear-gradient',
     *             gradientStart: <PIE.BgPosition>,
     *             angle: <PIE.Angle>,
     *             stops: [
     *                 { color: <PIE.Color>, offset: <PIE.Length> },
     *                 { color: <PIE.Color>, offset: <PIE.Length> }, ...
     *             ]
     *         }
     *     ]
     * }
     * @param {String} css
     * @override
     */
    parseCss: function( css ) {
        var el = this.targetElement,
            cs = el.currentStyle,
            tokenizer, token, image,
            tok_type = PIE.Tokenizer.Type,
            type_operator = tok_type.OPERATOR,
            type_ident = tok_type.IDENT,
            type_color = tok_type.COLOR,
            tokType, tokVal,
            positionIdents = this.positionIdents,
            gradient, stop,
            props = null;

function isBgPosToken( token ) {
            return token.isLengthOrPercent() || ( token.type & type_ident && token.value in positionIdents );
        }

function sizeToken( token ) {
            return ( token.isLengthOrPercent() && new PIE.Length( token.value ) ) || ( token.value === 'auto' && 'auto' );
        }

// If the CSS3-specific -pie-background property is present, parse it
        if( this.getCss3() ) {
            tokenizer = new PIE.Tokenizer( css );
            props = { images: [] };
            image = {};

while( token = tokenizer.next() ) {
                tokType = token.type;
                tokVal = token.value;

if( !image.type && tokType & tok_type.FUNCTION && tokVal === 'linear-gradient(' ) {
                    gradient = { stops: [], type: 'linear-gradient' };
                    stop = {};
                    while( token = tokenizer.next() ) {
                        tokType = token.type;
                        tokVal = token.value;

// If we reached the end of the function and had at least 2 stops, flush the info
                        if( tokType & tok_type.CHARACTER && tokVal === ')' ) {
                            if( stop.color ) {
                                gradient.stops.push( stop );
                            }
                            if( gradient.stops.length > 1 ) {
                                PIE.Util.merge( image, gradient );
                            }
                            break;
                        }

// Color stop - must start with color
                        if( tokType & type_color ) {
                            // if we already have an angle/position, make sure that the previous token was a comma
                            if( gradient.angle || gradient.gradientStart ) {
                                token = tokenizer.prev();
                                if( token.type !== type_operator ) {
                                    break; //fail
                                }
                                tokenizer.next();
                            }

stop = {
                                color: new PIE.Color( tokVal )
                            };
                            // check for offset following color
                            token = tokenizer.next();
                            if( token.isLengthOrPercent() ) {
                                stop.offset = new PIE.Length( token.value );
                            } else {
                                tokenizer.prev();
                            }
                        }
                        // Angle - can only appear in first spot
                        else if( tokType & tok_type.ANGLE && !gradient.angle && !stop.color && !gradient.stops.length ) {
                            gradient.angle = new PIE.Angle( token.value );
                        }
                        else if( isBgPosToken( token ) && !gradient.gradientStart && !stop.color && !gradient.stops.length ) {
                            tokenizer.prev();
                            gradient.gradientStart = new PIE.BgPosition(
                                tokenizer.until( function( t ) {
                                    return !isBgPosToken( t );
                                }, false )
                            );
                        }
                        else if( tokType & type_operator && tokVal === ',' ) {
                            if( stop.color ) {
                                gradient.stops.push( stop );
                                stop = {};
                            }
                        }
                        else {
                            // Found something we didn't recognize; fail without adding image
                            break;
                        }
                    }
                }
                else if( !image.type && tokType & tok_type.URL ) {
                    image.url = tokVal;
                    image.type = 'image';
                }
                else if( isBgPosToken( token ) && !image.size ) {
                    tokenizer.prev();
                    image.position = new PIE.BgPosition(
                        tokenizer.until( function( t ) {
                            return !isBgPosToken( t );
                        }, false )
                    );
                }
                else if( tokType & type_ident ) {
                    if( tokVal in this.repeatIdents ) {
                        image.repeat = tokVal;
                    }
                    else if( tokVal in this.originIdents ) {
                        image.origin = tokVal;
                        if( tokVal in this.clipIdents ) {
                            image.clip = tokVal;
                        }
                    }
                    else if( tokVal in this.attachIdents ) {
                        image.attachment = tokVal;
                    }
                }
                else if( tokType & type_color && !props.color ) {
                    props.color = new PIE.Color( tokVal );
                }
                else if( tokType & type_operator ) {
                    // background size
                    if( tokVal === '/' ) {
                        token = tokenizer.next();
                        tokType = token.type;
                        tokVal = token.value;
                        if( tokType & type_ident && tokVal in this.sizeIdents ) {
                            image.size = tokVal;
                        }
                        else if( tokVal = sizeToken( token ) ) {
                            image.size = {
                                w: tokVal,
                                h: sizeToken( tokenizer.next() ) || ( tokenizer.prev() && tokVal )
                            };
                        }
                    }
                    // new layer
                    else if( tokVal === ',' && image.type ) {
                        props.images.push( image );
                        image = {};
                    }
                }
                else {
                    // Found something unrecognized; chuck everything
                    return null;
                }
            }

// leftovers
            if( image.type ) {
                props.images.push( image );
            }
        }

// Otherwise, use the standard background properties; let IE give us the values rather than parsing them
        else {
            this.withActualBg( function() {
                var posX = cs.backgroundPositionX,
                    posY = cs.backgroundPositionY,
                    img = cs.backgroundImage,
                    color = cs.backgroundColor;

props = {};
                if( color !== 'transparent' ) {
                    props.color = new PIE.Color( color )
                }
                if( img !== 'none' ) {
                    props.images = [ {
                        type: 'image',
                        url: new PIE.Tokenizer( img ).next().value,
                        repeat: cs.backgroundRepeat,
                        position: new PIE.BgPosition( new PIE.Tokenizer( posX + ' ' + posY ).all() )
                    } ];
                }
            } );
        }

return ( props && ( props.color || ( props.images && props.images[0] ) ) ) ? props : null;
    },

/**
     * Execute a function with the actual background styles (not overridden with runtimeStyle
     * properties set by the renderers) available via currentStyle.
     * @param fn
     */
    withActualBg: function( fn ) {
        var rs = this.targetElement.runtimeStyle,
            rsImage = rs.backgroundImage,
            rsColor = rs.backgroundColor,
            ret;

if( rsImage ) rs.backgroundImage = '';
        if( rsColor ) rs.backgroundColor = '';

ret = fn.call( this );

if( rsImage ) rs.backgroundImage = rsImage;
        if( rsColor ) rs.backgroundColor = rsColor;

return ret;
    },

getCss: PIE.StyleInfoBase.cacheWhenLocked( function() {
        var el = this.targetElement;
        return this.getCss3() ||
               this.withActualBg( function() {
                   var cs = el.currentStyle;
                   return cs.backgroundColor + ' ' + cs.backgroundImage + ' ' + cs.backgroundRepeat + ' ' +
                   cs.backgroundPositionX + ' ' + cs.backgroundPositionY;
               } );
    } ),

getCss3: PIE.StyleInfoBase.cacheWhenLocked( function() {
        var el = this.targetElement;
        return el.style[ this.styleProperty ] || el.currentStyle.getAttribute( this.cssProperty );
    } ),

/**
	 * Tests if style.PiePngFix or the -pie-png-fix property is set to true in IE6.
	 */
	isPngFix: function() {
		if (PIE.ieVersion > 6) {
			return false;
		} 
        var el = this.targetElement;
        var val = (el.style.PiePngFix || el.currentStyle.getAttribute( PIE.CSS_PREFIX + 'png-fix' ));
        return val === true ||Êval == 'true';
    },
    
    /**
     * The isActive logic is slightly different, because getProps() always returns an object
     * even if it is just falling back to the native background properties.  But we only want
     * to report is as being "active" if either the -pie-background override property is present
     * and parses successfully or '-pie-png-fix' is set to true in IE6.
     */
    isActive: PIE.StyleInfoBase.cacheWhenLocked( function() {
        return (this.getCss3() || this.isPngFix()) && !!this.getProps();
    } )

} );/**
 * Handles parsing, caching, and detecting changes to border CSS
 * @constructor
 * @param {Element} el the target element
 */
PIE.BorderStyleInfo = PIE.StyleInfoBase.newStyleInfo( {

sides: [ 'Top', 'Right', 'Bottom', 'Left' ],
    namedWidths: {
        thin: '1px',
        medium: '3px',
        thick: '5px'
    },

parseCss: function( css ) {
        var w = {},
            s = {},
            c = {},
            active = false,
            colorsSame = true,
            stylesSame = true,
            widthsSame = true;

this.withActualBorder( function() {
            var el = this.targetElement,
                cs = el.currentStyle,
                i = 0,
                style, color, width, lastStyle, lastColor, lastWidth, side, ltr;
            for( ; i < 4; i++ ) {
                side = this.sides[ i ];

ltr = side.charAt(0).toLowerCase();
                style = s[ ltr ] = cs[ 'border' + side + 'Style' ];
                color = cs[ 'border' + side + 'Color' ];
                width = cs[ 'border' + side + 'Width' ];

if( i > 0 ) {
                    if( style !== lastStyle ) { stylesSame = false; }
                    if( color !== lastColor ) { colorsSame = false; }
                    if( width !== lastWidth ) { widthsSame = false; }
                }
                lastStyle = style;
                lastColor = color;
                lastWidth = width;

c[ ltr ] = new PIE.Color( color );

width = w[ ltr ] = new PIE.Length( s[ ltr ] === 'none' ? '0' : ( this.namedWidths[ width ] || width ) );
                if( width.pixels( this.targetElement ) > 0 ) {
                    active = true;
                }
            }
        } );

return active ? {
            widths: w,
            styles: s,
            colors: c,
            widthsSame: widthsSame,
            colorsSame: colorsSame,
            stylesSame: stylesSame
        } : null;
    },

getCss: PIE.StyleInfoBase.cacheWhenLocked( function() {
        var el = this.targetElement,
            cs = el.currentStyle,
            css;

this.withActualBorder( function() {
            css = cs.borderWidth + '|' + cs.borderStyle + '|' + cs.borderColor;
        } );
        return css;
    } ),

/**
     * Execute a function with the actual border styles (not overridden with runtimeStyle
     * properties set by the renderers) available via currentStyle.
     * @param fn
     */
    withActualBorder: function( fn ) {
        var rs = this.targetElement.runtimeStyle,
            rsWidth = rs.borderWidth,
            rsColor = rs.borderColor,
            ret;

if( rsWidth ) rs.borderWidth = '';
        if( rsColor ) rs.borderColor = '';

ret = fn.call( this );

if( rsWidth ) rs.borderWidth = rsWidth;
        if( rsColor ) rs.borderColor = rsColor;

return ret;
    }

} );
/**
 * Handles parsing, caching, and detecting changes to border-radius CSS
 * @constructor
 * @param {Element} el the target element
 */
(function() {

PIE.BorderRadiusStyleInfo = PIE.StyleInfoBase.newStyleInfo( {

cssProperty: 'border-radius',
    styleProperty: 'borderRadius',

parseCss: function( css ) {
        var p = null, x, y,
            tokenizer, token, length,
            hasNonZero = false;

function newLength( v ) {
            return new PIE.Length( v );
        }

if( css ) {
            tokenizer = new PIE.Tokenizer( css );

// Grab the initial sequence of lengths
            if( x = collectLengths() ) {
                // See if there is a slash followed by more lengths, for the y-axis radii
                if( token ) {
                    if( token.type & PIE.Tokenizer.Type.OPERATOR && token.value === '/' ) {
                        y = collectLengths();
                    }
                } else {
                    y = x;
                }

// Treat all-zero values the same as no value
                if( hasNonZero && x && y ) {
                    p = { x: x, y : y };
                }
            }
        }

return p;
    }
} );

var ZERO = PIE.Length.ZERO,
    zeros = { 'tl': ZERO, 'tr': ZERO, 'br': ZERO, 'bl': ZERO };
PIE.BorderRadiusStyleInfo.ALL_ZERO = { x: zeros, y: zeros };

})();/**
 * Handles parsing, caching, and detecting changes to border-image CSS
 * @constructor
 * @param {Element} el the target element
 */
PIE.BorderImageStyleInfo = PIE.StyleInfoBase.newStyleInfo( {

cssProperty: 'border-image',
    styleProperty: 'borderImage',

repeatIdents: { 'stretch':1, 'round':1, 'repeat':1, 'space':1 },

parseCss: function( css ) {
        var p = null, tokenizer, token, type, value,
            slices, widths, outsets,
            slashCount = 0, cs,
            Type = PIE.Tokenizer.Type,
            IDENT = Type.IDENT,
            NUMBER = Type.NUMBER,
            LENGTH = Type.LENGTH,
            PERCENT = Type.PERCENT;

if( css ) {
            tokenizer = new PIE.Tokenizer( css );
            p = {};

function isSlash( token ) {
                return token && ( token.type & Type.OPERATOR ) && ( token.value === '/' );
            }

function isFillIdent( token ) {
                return token && ( token.type & IDENT ) && ( token.value === 'fill' );
            }

function collectSlicesEtc() {
                slices = tokenizer.until( function( tok ) {
                    return !( tok.type & ( NUMBER | PERCENT ) );
                } );

if( isFillIdent( tokenizer.next() ) && !p.fill ) {
                    p.fill = true;
                } else {
                    tokenizer.prev();
                }

if( isSlash( tokenizer.next() ) ) {
                    slashCount++;
                    widths = tokenizer.until( function( tok ) {
                        return !( token.type & ( NUMBER | PERCENT | LENGTH ) ) && !( ( token.type & IDENT ) && token.value === 'auto' );
                    } );

if( isSlash( tokenizer.next() ) ) {
                        slashCount++;
                        outsets = tokenizer.until( function( tok ) {
                            return !( token.type & ( NUMBER | LENGTH ) );
                        } );
                    }
                } else {
                    tokenizer.prev();
                }
            }

while( token = tokenizer.next() ) {
                type = token.type;
                value = token.value;

// Numbers and/or 'fill' keyword: slice values. May be followed optionally by width values, followed optionally by outset values
                if( type & ( NUMBER | PERCENT ) && !slices ) {
                    tokenizer.prev();
                    collectSlicesEtc();
                }
                else if( isFillIdent( token ) && !p.fill ) {
                    p.fill = true;
                    collectSlicesEtc();
                }

// Idents: one or values for 'repeat'
                else if( ( type & IDENT ) && this.repeatIdents[value] && !p.repeat ) {
                    p.repeat = { h: value };
                    if( token = tokenizer.next() ) {
                        if( ( token.type & IDENT ) && this.repeatIdents[token.value] ) {
                            p.repeat.v = token.value;
                        } else {
                            tokenizer.prev();
                        }
                    }
                }

// URL of the image
                else if( ( type & Type.URL ) && !p.src ) {
                    p.src =  value;
                }

// Found something unrecognized; exit.
                else {
                    return null;
                }
            }

// Validate what we collected
            if( !p.src || !slices || slices.length < 1 || slices.length > 4 ||
                ( widths && widths.length > 4 ) || ( slashCount === 1 && widths.length < 1 ) ||
                ( outsets && outsets.length > 4 ) || ( slashCount === 2 && outsets.length < 1 ) ) {
                return null;
            }

// Fill in missing values
            if( !p.repeat ) {
                p.repeat = { h: 'stretch' };
            }
            if( !p.repeat.v ) {
                p.repeat.v = p.repeat.h;
            }

function distributeSides( tokens, convertFn ) {
                return {
                    t: convertFn( tokens[0] ),
                    r: convertFn( tokens[1] || tokens[0] ),
                    b: convertFn( tokens[2] || tokens[0] ),
                    l: convertFn( tokens[3] || tokens[1] || tokens[0] )
                };
            }

p.slice = distributeSides( slices, function( tok ) {
                return new PIE.Length( ( tok.type & NUMBER ) ? tok.value + 'px' : tok.value );
            } );

p.width = widths && widths.length > 0 ?
                    distributeSides( widths, function( tok ) {
                        return tok.type & ( LENGTH | PERCENT ) ? new PIE.Length( tok.value ) : tok.value;
                    } ) :
                    ( cs = this.targetElement.currentStyle ) && {
                        t: new PIE.Length( cs.borderTopWidth ),
                        r: new PIE.Length( cs.borderRightWidth ),
                        b: new PIE.Length( cs.borderBottomWidth ),
                        l: new PIE.Length( cs.borderLeftWidth )
                    };

p.outset = distributeSides( outsets || [ 0 ], function( tok ) {
                return tok.type & LENGTH ? new PIE.Length( tok.value ) : tok.value;
            } );
        }

return p;
    }
} );/**
 * Handles parsing, caching, and detecting changes to box-shadow CSS
 * @constructor
 * @param {Element} el the target element
 */
PIE.BoxShadowStyleInfo = PIE.StyleInfoBase.newStyleInfo( {

cssProperty: 'box-shadow',
    styleProperty: 'boxShadow',

parseCss: function( css ) {
        var props,
            Length = PIE.Length,
            Type = PIE.Tokenizer.Type,
            tokenizer;

if( css ) {
            tokenizer = new PIE.Tokenizer( css );
            props = { outset: [], inset: [] };

function parseItem() {
                var token, type, value, color, lengths, inset, len;

while( token = tokenizer.next() ) {
                    value = token.value;
                    type = token.type;

if( type & Type.OPERATOR && value === ',' ) {
                        break;
                    }
                    else if( token.isLength() && !lengths ) {
                        tokenizer.prev();
                        lengths = tokenizer.until( function( token ) {
                            return !token.isLength();
                        } );
                    }
                    else if( type & Type.COLOR && !color ) {
                        color = value;
                    }
                    else if( type & Type.IDENT && value === 'inset' && !inset ) {
                        inset = true;
                    }
                    else { //encountered an unrecognized token; fail.
                        return false;
                    }
                }

len = lengths && lengths.length;
                if( len > 1 && len < 5 ) {
                    ( inset ? props.inset : props.outset ).push( {
                        xOffset: new Length( lengths[0].value ),
                        yOffset: new Length( lengths[1].value ),
                        blur: new Length( lengths[2] ? lengths[2].value : '0' ),
                        spread: new Length( lengths[3] ? lengths[3].value : '0' ),
                        color: new PIE.Color( color || 'currentColor' )
                    } );
                    return true;
                }
                return false;
            }

while( parseItem() ) {}
        }

return props && ( props.inset.length || props.outset.length ) ? props : null;
    }
} );
/**
 * Retrieves the state of the element's visibility and display
 * @constructor
 * @param {Element} el the target element
 */
PIE.VisibilityStyleInfo = PIE.StyleInfoBase.newStyleInfo( {

getCss: PIE.StyleInfoBase.cacheWhenLocked( function() {
        var cs = this.targetElement.currentStyle;
        return cs.visibility + '|' + cs.display;
    } ),

parseCss: function() {
        var el = this.targetElement,
            rs = el.runtimeStyle,
            cs = el.currentStyle,
            rsVis = rs.visibility,
            csVis;

rs.visibility = '';
        csVis = cs.visibility;
        rs.visibility = rsVis;

return {
            visible: csVis !== 'hidden',
            displayed: cs.display !== 'none'
        }
    },

/**
     * Always return false for isActive, since this property alone will not trigger
     * a renderer to do anything.
     */
    isActive: function() {
        return false;
    }

} );
PIE.RendererBase = {

/**
     * Create a new Renderer class, with the standard constructor, and augmented by
     * the RendererBase's members.
     * @param proto
     */
    newRenderer: function( proto ) {
        function Renderer( el, boundsInfo, styleInfos, parent ) {
            this.targetElement = el;
            this.boundsInfo = boundsInfo;
            this.styleInfos = styleInfos;
            this.parent = parent;
        }
        PIE.Util.merge( Renderer.prototype, PIE.RendererBase, proto );
        return Renderer;
    },

/**
     * Flag indicating the element has already been positioned at least once.
     * @type {boolean}
     */
    isPositioned: false,

/**
     * Determine if the renderer needs to be updated
     * @return {boolean}
     */
    needsUpdate: function() {
        return false;
    },

/**
     * Tell the renderer to update based on modified properties
     */
    updateProps: function() {
    },

/**
     * Tell the renderer to update based on modified element position
     */
    updatePos: function() {
        this.isPositioned = true;
    },

/**
     * Tell the renderer to update based on modified element dimensions
     */
    updateSize: function() {
    },

/**
     * Add a layer element, with the given z-order index, to the renderer's main box element. We can't use
     * z-index because that breaks when the root rendering box's z-index is 'auto' in IE8+ standards mode.
     * So instead we make sure they are inserted into the DOM in the correct order.
     * @param {number} index
     * @param {Element} el
     */
    addLayer: function( index, el ) {
        this.removeLayer( index );
        for( var layers = this._layers || ( this._layers = [] ), i = index + 1, len = layers.length, layer; i < len; i++ ) {
            layer = layers[i];
            if( layer ) {
                break;
            }
        }
        layers[index] = el;
        this.getBox().insertBefore( el, layer || null );
    },

/**
     * Retrieve a layer element by its index, or null if not present
     * @param {number} index
     * @return {Element}
     */
    getLayer: function( index ) {
        var layers = this._layers;
        return layers && layers[index] || null;
    },

/**
     * Remove a layer element by its index
     * @param {number} index
     */
    removeLayer: function( index ) {
        var layer = this.getLayer( index ),
            box = this._box;
        if( layer && box ) {
            box.removeChild( layer );
            this._layers[index] = null;
        }
    },

/**
     * Get a VML shape by name, creating it if necessary.
     * @param {string} name A name identifying the element
     * @param {string=} subElName If specified a subelement of the shape will be created with this tag name
     * @param {Element} parent The parent element for the shape; will be ignored if 'group' is specified
     * @param {number=} group If specified, an ordinal group for the shape. 1 or greater. Groups are rendered
     *                  using container elements in the correct order, to get correct z stacking without z-index.
     */
    getShape: function( name, subElName, parent, group ) {
        var shapes = this._shapes || ( this._shapes = {} ),
            shape = shapes[ name ],
            s;

if( !shape ) {
            shape = shapes[ name ] = PIE.Util.createVmlElement( 'shape' );
            if( subElName ) {
                shape.appendChild( shape[ subElName ] = PIE.Util.createVmlElement( subElName ) );
            }

if( group ) {
                parent = this.getLayer( group );
                if( !parent ) {
                    this.addLayer( group, doc.createElement( 'group' + group ) );
                    parent = this.getLayer( group );
                }
            }

parent.appendChild( shape );

s = shape.style;
            s.position = 'absolute';
            s.left = s.top = 0;
            s['behavior'] = 'url(#default#VML)';
        }
        return shape;
    },

/**
     * Delete a named shape which was created by getShape(). Returns true if a shape with the
     * given name was found and deleted, or false if there was no shape of that name.
     * @param {string} name
     * @return {boolean}
     */
    deleteShape: function( name ) {
        var shapes = this._shapes,
            shape = shapes && shapes[ name ];
        if( shape ) {
            shape.parentNode.removeChild( shape );
            delete shapes[ name ];
        }
        return !!shape;
    },

/**
     * For a given set of border radius length/percentage values, convert them to concrete pixel
     * values based on the current size of the target element.
     * @param {Object} radii
     * @return {Object}
     */
    getRadiiPixels: function( radii ) {
        var el = this.targetElement,
            bounds = this.boundsInfo.getBounds(),
            w = bounds.w,
            h = bounds.h,
            tlX, tlY, trX, trY, brX, brY, blX, blY, f;

tlX = radii.x['tl'].pixels( el, w );
        tlY = radii.y['tl'].pixels( el, h );
        trX = radii.x['tr'].pixels( el, w );
        trY = radii.y['tr'].pixels( el, h );
        brX = radii.x['br'].pixels( el, w );
        brY = radii.y['br'].pixels( el, h );
        blX = radii.x['bl'].pixels( el, w );
        blY = radii.y['bl'].pixels( el, h );

// If any corner ellipses overlap, reduce them all by the appropriate factor. This formula
        // is taken straight from the CSS3 Backgrounds and Borders spec.
        f = Math.min(
            w / ( tlX + trX ),
            h / ( trY + brY ),
            w / ( blX + brX ),
            h / ( tlY + blY )
        );
        if( f < 1 ) {
            tlX *= f;
            tlY *= f;
            trX *= f;
            trY *= f;
            brX *= f;
            brY *= f;
            blX *= f;
            blY *= f;
        }

return {
            x: {
                'tl': tlX,
                'tr': trX,
                'br': brX,
                'bl': blX
            },
            y: {
                'tl': tlY,
                'tr': trY,
                'br': brY,
                'bl': blY
            }
        }
    },

/**
     * Return the VML path string for the element's background box, with corners rounded.
     * @param {Object.<{t:number, r:number, b:number, l:number}>} shrink - if present, specifies number of
     *        pixels to shrink the box path inward from the element's four sides.
     * @param {number=} mult If specified, all coordinates will be multiplied by this number
     * @param {Object=} radii If specified, this will be used for the corner radii instead of the properties
     *        from this renderer's borderRadiusInfo object.
     * @return {string} the VML path
     */
    getBoxPath: function( shrink, mult, radii ) {
        mult = mult || 1;

var r, str,
            bounds = this.boundsInfo.getBounds(),
            w = bounds.w * mult,
            h = bounds.h * mult,
            radInfo = this.styleInfos.borderRadiusInfo,
            floor = Math.floor, ceil = Math.ceil,
            shrinkT = shrink ? shrink.t * mult : 0,
            shrinkR = shrink ? shrink.r * mult : 0,
            shrinkB = shrink ? shrink.b * mult : 0,
            shrinkL = shrink ? shrink.l * mult : 0,
            tlX, tlY, trX, trY, brX, brY, blX, blY;

if( radii || radInfo.isActive() ) {
            r = this.getRadiiPixels( radii || radInfo.getProps() );

tlX = r.x['tl'] * mult;
            tlY = r.y['tl'] * mult;
            trX = r.x['tr'] * mult;
            trY = r.y['tr'] * mult;
            brX = r.x['br'] * mult;
            brY = r.y['br'] * mult;
            blX = r.x['bl'] * mult;
            blY = r.y['bl'] * mult;

str = 'm' + floor( shrinkL ) + ',' + floor( tlY ) +
                'qy' + floor( tlX ) + ',' + floor( shrinkT ) +
                'l' + ceil( w - trX ) + ',' + floor( shrinkT ) +
                'qx' + ceil( w - shrinkR ) + ',' + floor( trY ) +
                'l' + ceil( w - shrinkR ) + ',' + ceil( h - brY ) +
                'qy' + ceil( w - brX ) + ',' + ceil( h - shrinkB ) +
                'l' + floor( blX ) + ',' + ceil( h - shrinkB ) +
                'qx' + floor( shrinkL ) + ',' + ceil( h - blY ) + ' x e';
        } else {
            // simplified path for non-rounded box
            str = 'm' + floor( shrinkL ) + ',' + floor( shrinkT ) +
                  'l' + ceil( w - shrinkR ) + ',' + floor( shrinkT ) +
                  'l' + ceil( w - shrinkR ) + ',' + ceil( h - shrinkB ) +
                  'l' + floor( shrinkL ) + ',' + ceil( h - shrinkB ) +
                  'xe';
        }
        return str;
    },

/**
     * Get the container element for the shapes, creating it if necessary.
     */
    getBox: function() {
        var box = this.parent.getLayer( this.boxZIndex ), s;

if( !box ) {
            box = doc.createElement( this.boxName );
            s = box.style;
            s.position = 'absolute';
            s.top = s.left = 0;
            this.parent.addLayer( this.boxZIndex, box );
        }

return box;
    },

/**
     * Destroy the rendered objects. This is a base implementation which handles common renderer
     * structures, but individual renderers may override as necessary.
     */
    destroy: function() {
        this.parent.removeLayer( this.boxZIndex );
        delete this._shapes;
        delete this._layers;
    }
};
/**
 * Root renderer; creates the outermost container element and handles keeping it aligned
 * with the target element's size and position.
 * @param {Element} el The target element
 * @param {Object} styleInfos The StyleInfo objects
 */
PIE.RootRenderer = PIE.RendererBase.newRenderer( {

isActive: function() {
        var children = this.childRenderers;
        for( var i in children ) {
            if( children.hasOwnProperty( i ) && children[ i ].isActive() ) {
                return true;
            }
        }
        return false;
    },

needsUpdate: function() {
        return this.styleInfos.visibilityInfo.changed();
    },

updatePos: function() {
        if( this.isActive() ) {
            var el = this.targetElement,
                par = el,
                docEl,
                elBounds, parRect,
                s = this.getBox().style, cs,
                x = 0, y = 0;

// Get the element's offsets from its nearest positioned ancestor. Uses
            // getBoundingClientRect for accuracy and speed.
            do {
                par = par.offsetParent;
            } while( par && par.currentStyle.position === 'static' );
            elBounds = this.boundsInfo.getBounds();
            if( par ) {
                parRect = par.getBoundingClientRect();
                cs = par.currentStyle;
                x = elBounds.x - parRect.left - ( parseFloat(cs.borderLeftWidth) || 0 );
                y = elBounds.y - parRect.top - ( parseFloat(cs.borderTopWidth) || 0 );
            } else {
                docEl = doc.documentElement;
                x = elBounds.x + docEl.scrollLeft - docEl.clientLeft;
                y = elBounds.y + docEl.scrollTop - docEl.clientTop;
            }

s.left = x;
            s.top = y;
            s.zIndex = el.currentStyle.position === 'static' ? -1 : el.currentStyle.zIndex;
            this.isPositioned = true;
        }
    },

updateSize: function() {
        // NO-OP
    },

updateVisibility: function() {
        var vis = this.styleInfos.visibilityInfo.getProps();
        this.getBox().style.display = ( vis.visible && vis.displayed ) ? '' : 'none';
    },

updateProps: function() {
        if( this.isActive() ) {
            this.updateVisibility();
        } else {
            this.destroy();
        }
    },

getBox: function() {
        var box = this._box, el, s;
        if( !box ) {
            el = this.targetElement;
            box = this._box = doc.createElement( 'css3-container' );
            s = box.style;

s.position = el.currentStyle.position === 'fixed' ? 'fixed' : 'absolute';
            this.updateVisibility();

el.parentNode.insertBefore( box, el );
        }
        return box;
    },

destroy: function() {
        var box = this._box;
        if( box && box.parentNode ) {
            box.parentNode.removeChild( box );
        }
        delete this._box;
        delete this._layers;
    }

} );
/**
 * Renderer for element backgrounds.
 * @constructor
 * @param {Element} el The target element
 * @param {Object} styleInfos The StyleInfo objects
 * @param {PIE.RootRenderer} parent
 */
PIE.BackgroundRenderer = PIE.RendererBase.newRenderer( {

boxZIndex: 2,
    boxName: 'background',

needsUpdate: function() {
        var si = this.styleInfos;
        return si.backgroundInfo.changed() || si.borderRadiusInfo.changed();
    },

isActive: function() {
        var si = this.styleInfos;
        return si.borderImageInfo.isActive() ||
               si.borderRadiusInfo.isActive() ||
               si.backgroundInfo.isActive() ||
               ( si.boxShadowInfo.isActive() && si.boxShadowInfo.getProps().inset );
    },

updateSize: function() {
        if( this.isActive() ) {
            this.draw();
        }
    },

updateProps: function() {
        this.destroy();
        if( this.isActive() ) {
            this.draw();
        }
    },

/**
     * Draw the shapes
     */
    draw: function() {
        var bounds = this.boundsInfo.getBounds();
        if( bounds.w && bounds.h ) {
            this.drawBgColor();
            this.drawBgImages();
        }
    },

/**
     * Draw the background color shape
     */
    drawBgColor: function() {
        var props = this.styleInfos.backgroundInfo.getProps(),
            bounds = this.boundsInfo.getBounds(),
            el = this.targetElement,
            color = props && props.color,
            shape, w, h, s, alpha;

if( color && color.alpha() > 0 ) {
            this.hideBackground();

shape = this.getShape( 'bgColor', 'fill', this.getBox(), 1 );
            w = bounds.w;
            h = bounds.h;
            shape.stroked = false;
            shape.coordsize = w * 2 + ',' + h * 2;
            shape.coordorigin = '1,1';
            shape.path = this.getBoxPath( null, 2 );
            s = shape.style;
            s.width = w;
            s.height = h;
            shape.fill.color = color.value( el );

alpha = color.alpha();
            if( alpha < 1 ) {
                shape.fill.opacity = alpha;
            }
        } else {
            this.deleteShape( 'bgColor' );
        }
    },

/**
     * Draw all the background image layers
     */
    drawBgImages: function() {
        var props = this.styleInfos.backgroundInfo.getProps(),
            bounds = this.boundsInfo.getBounds(),
            images = props && props.images,
            img, shape, w, h, s, i;

if( images ) {
            this.hideBackground();

w = bounds.w;
            h = bounds.h;

i = images.length;
            while( i-- ) {
                img = images[i];
                shape = this.getShape( 'bgImage' + i, 'fill', this.getBox(), 2 );

shape.stroked = false;
                shape.fill.type = 'tile';
                shape.fillcolor = 'none';
                shape.coordsize = w * 2 + ',' + h * 2;
                shape.coordorigin = '1,1';
                shape.path = this.getBoxPath( 0, 2 );
                s = shape.style;
                s.width = w;
                s.height = h;

if( img.type === 'linear-gradient' ) {
                    this.addLinearGradient( shape, img );
                }
                else {
                    shape.fill.src = img.url;
                    this.positionBgImage( shape, i );
                }
            }
        }

// Delete any bgImage shapes previously created which weren't used above
        i = images ? images.length : 0;
        while( this.deleteShape( 'bgImage' + i++ ) ) {}
    },

/**
     * Set the position and clipping of the background image for a layer
     * @param {Element} shape
     * @param {number} index
     */
    positionBgImage: function( shape, index ) {
        PIE.Util.withImageSize( shape.fill.src, function( size ) {
            var fill = shape.fill,
                el = this.targetElement,
                bounds = this.boundsInfo.getBounds(),
                elW = bounds.w,
                elH = bounds.h,
                si = this.styleInfos,
                border = si.borderInfo.getProps(),
                bw = border && border.widths,
                bwT = bw ? bw['t'].pixels( el ) : 0,
                bwR = bw ? bw['r'].pixels( el ) : 0,
                bwB = bw ? bw['b'].pixels( el ) : 0,
                bwL = bw ? bw['l'].pixels( el ) : 0,
                bg = si.backgroundInfo.getProps().images[ index ],
                bgPos = bg.position ? bg.position.coords( el, elW - size.w - bwL - bwR, elH - size.h - bwT - bwB ) : { x:0, y:0 },
                repeat = bg.repeat,
                pxX, pxY,
                clipT = 0, clipL = 0,
                clipR = elW + 1, clipB = elH + 1, //make sure the default clip region is not inside the box (by a subpixel)
                clipAdjust = PIE.ieVersion === 8 ? 0 : 1; //prior to IE8 requires 1 extra pixel in the image clip region

// Positioning - find the pixel offset from the top/left and convert to a ratio
            // The position is shifted by half a pixel, to adjust for the half-pixel coordorigin shift which is
            // needed to fix antialiasing but makes the bg image fuzzy.
            pxX = Math.round( bgPos.x ) + bwL + 0.5;
            pxY = Math.round( bgPos.y ) + bwT + 0.5;
            
            
            // Illegal input string in Vector2D Fix
            // http://css3pie.com/forum/viewtopic.php?f=3&t=4
            if(pxX < 0 || pxY < 0) return;
            
            fill.position = ( pxX / elW ) + ',' + ( pxY / elH );

// Repeating - clip the image shape
            if( repeat && repeat !== 'repeat' ) {
                if( repeat === 'repeat-x' || repeat === 'no-repeat' ) {
                    clipT = pxY + 1;
                    clipB = pxY + size.h + clipAdjust;
                }
                if( repeat === 'repeat-y' || repeat === 'no-repeat' ) {
                    clipL = pxX + 1;
                    clipR = pxX + size.w + clipAdjust;
                }
                shape.style.clip = 'rect(' + clipT + 'px,' + clipR + 'px,' + clipB + 'px,' + clipL + 'px)';
            }
        }, this );
    },

/**
     * Draw the linear gradient for a gradient layer
     * @param {Element} shape
     * @param {Object} info The object holding the information about the gradient
     */
    addLinearGradient: function( shape, info ) {
        var el = this.targetElement,
            bounds = this.boundsInfo.getBounds(),
            w = bounds.w,
            h = bounds.h,
            fill = shape.fill,
            angle = info.angle,
            startPos = info.gradientStart,
            stops = info.stops,
            stopCount = stops.length,
            PI = Math.PI,
            UNDEF,
            startX, startY,
            endX, endY,
            startCornerX, startCornerY,
            endCornerX, endCornerY,
            vmlAngle, vmlGradientLength, vmlColors,
            deltaX, deltaY, lineLength,
            stopPx, vmlOffsetPct,
            p, i, j, before, after;

/**
         * Find the point along a given line (defined by a starting point and an angle), at which
         * that line is intersected by a perpendicular line extending through another point.
         * @param x1 - x coord of the starting point
         * @param y1 - y coord of the starting point
         * @param angle - angle of the line extending from the starting point (in degrees)
         * @param x2 - x coord of point along the perpendicular line
         * @param y2 - y coord of point along the perpendicular line
         * @return [ x, y ]
         */
        function perpendicularIntersect( x1, y1, angle, x2, y2 ) {
            // Handle straight vertical and horizontal angles, for performance and to avoid
            // divide-by-zero errors.
            if( angle === 0 || angle === 180 ) {
                return [ x2, y1 ];
            }
            else if( angle === 90 || angle === 270 ) {
                return [ x1, y2 ];
            }
            else {
                // General approach: determine the Ax+By=C formula for each line (the slope of the second
                // line is the negative inverse of the first) and then solve for where both formulas have
                // the same x/y values.
                var a1 = Math.tan( -angle * PI / 180 ),
                    c1 = a1 * x1 - y1,
                    a2 = -1 / a1,
                    c2 = a2 * x2 - y2,
                    d = a2 - a1,
                    endX = ( c2 - c1 ) / d,
                    endY = ( a1 * c2 - a2 * c1 ) / d;
                return [ endX, endY ];
            }
        }

// Find the "start" and "end" corners; these are the corners furthest along the gradient line.
        // This is used below to find the start/end positions of the CSS3 gradient-line, and also in finding
        // the total length of the VML rendered gradient-line corner to corner.
        function findCorners() {
            startCornerX = ( angle >= 90 && angle < 270 ) ? w : 0;
            startCornerY = angle < 180 ? h : 0;
            endCornerX = w - startCornerX;
            endCornerY = h - startCornerY;
        }

// Normalize the angle to a value between [0, 360)
        function normalizeAngle() {
            while( angle < 0 ) {
                angle += 360;
            }
            angle = angle % 360;
        }

// Find the distance between two points
        function distance( p1, p2 ) {
            var dx = p2[0] - p1[0],
                dy = p2[1] - p1[1];
            return Math.abs(
                dx === 0 ? dy :
                dy === 0 ? dx :
                Math.sqrt( dx * dx + dy * dy )
            );
        }

// Find the start and end points of the gradient
        if( startPos ) {
            startPos = startPos.coords( el, w, h );
            startX = startPos.x;
            startY = startPos.y;
        }
        if( angle ) {
            angle = angle.degrees();

normalizeAngle();
            findCorners();

// If no start position was specified, then choose a corner as the starting point.
            if( !startPos ) {
                startX = startCornerX;
                startY = startCornerY;
            }

// Find the end position by extending a perpendicular line from the gradient-line which
            // intersects the corner opposite from the starting corner.
            p = perpendicularIntersect( startX, startY, angle, endCornerX, endCornerY );
            endX = p[0];
            endY = p[1];
        }
        else if( startPos ) {
            // Start position but no angle specified: find the end point by rotating 180deg around the center
            endX = w - startX;
            endY = h - startY;
        }
        else {
            // Neither position nor angle specified; create vertical gradient from top to bottom
            startX = startY = endX = 0;
            endY = h;
        }
        deltaX = endX - startX;
        deltaY = endY - startY;

if( angle === UNDEF ) {
            // Get the angle based on the change in x/y from start to end point. Checks first for horizontal
            // or vertical angles so they get exact whole numbers rather than what atan2 gives.
            angle = ( !deltaX ? ( deltaY < 0 ? 90 : 270 ) :
                        ( !deltaY ? ( deltaX < 0 ? 180 : 0 ) :
                            -Math.atan2( deltaY, deltaX ) / PI * 180
                        )
                    );
            normalizeAngle();
            findCorners();
        }

// In VML land, the angle of the rendered gradient depends on the aspect ratio of the shape's
        // bounding box; for example specifying a 45 deg angle actually results in a gradient
        // drawn diagonally from one corner to its opposite corner, which will only appear to the
        // viewer as 45 degrees if the shape is equilateral.  We adjust for this by taking the x/y deltas
        // between the start and end points, multiply one of them by the shape's aspect ratio,
        // and get their arctangent, resulting in an appropriate VML angle. If the angle is perfectly
        // horizontal or vertical then we don't need to do this conversion.
        vmlAngle = ( angle % 90 ) ? Math.atan2( deltaX * w / h, deltaY ) / PI * 180 : ( angle + 90 );

// VML angles are 180 degrees offset from CSS angles
        vmlAngle += 180;
        vmlAngle = vmlAngle % 360;

// Add all the stops to the VML 'colors' list, including the first and last stops.
        // For each, we find its pixel offset along the gradient-line; if the offset of a stop is less
        // than that of its predecessor we increase it to be equal. We then map that pixel offset to a
        // percentage along the VML gradient-line, which runs from shape corner to corner.
        lineLength = distance( [ startX, startY ], [ endX, endY ] );
        vmlGradientLength = distance( [ startCornerX, startCornerY ], perpendicularIntersect( startCornerX, startCornerY, angle, endCornerX, endCornerY ) );
        vmlColors = [];
        vmlOffsetPct = distance( [ startX, startY ], perpendicularIntersect( startX, startY, angle, startCornerX, startCornerY ) ) / vmlGradientLength * 100;

// Find the pixel offsets along the CSS3 gradient-line for each stop.
        stopPx = [];
        for( i = 0; i < stopCount; i++ ) {
            stopPx.push( stops[i].offset ? stops[i].offset.pixels( el, lineLength ) :
                         i === 0 ? 0 : i === stopCount - 1 ? lineLength : null );
        }
        // Fill in gaps with evenly-spaced offsets
        for( i = 1; i < stopCount; i++ ) {
            if( stopPx[ i ] === null ) {
                before = stopPx[ i - 1 ];
                j = i;
                do {
                    after = stopPx[ ++j ];
                } while( after === null );
                stopPx[ i ] = before + ( after - before ) / ( j - i + 1 );
            }
            // Make sure each stop's offset is no less than the one before it
            stopPx[ i ] = Math.max( stopPx[ i ], stopPx[ i - 1 ] );
        }

// Convert to percentage along the VML gradient line and add to the VML 'colors' value
        for( i = 0; i < stopCount; i++ ) {
            vmlColors.push(
                ( vmlOffsetPct + ( stopPx[ i ] / vmlGradientLength * 100 ) ) + '% ' + stops[i].color.value( el )
            );
        }

// Now, finally, we're ready to render the gradient fill. Set the start and end colors to
        // the first and last stop colors; this just sets outer bounds for the gradient.
        fill['angle'] = vmlAngle;
        fill['type'] = 'gradient';
        fill['method'] = 'sigma';
        fill['color'] = stops[0].color.value( el );
        fill['color2'] = stops[stopCount - 1].color.value( el );
        fill['colors'].value = vmlColors.join( ',' );
    },

/**
     * Hide the actual background image and color of the element.
     */
    hideBackground: function() {
        var rs = this.targetElement.runtimeStyle;
        rs.backgroundImage = 'url(about:blank)'; //ensures the background area reacts to mouse events
        rs.backgroundColor = 'transparent';
    },

destroy: function() {
        PIE.RendererBase.destroy.call( this );
        var rs = this.targetElement.runtimeStyle;
        rs.backgroundImage = rs.backgroundColor = '';
    }

} );
/**
 * Renderer for element borders.
 * @constructor
 * @param {Element} el The target element
 * @param {Object} styleInfos The StyleInfo objects
 * @param {PIE.RootRenderer} parent
 */
PIE.BorderRenderer = PIE.RendererBase.newRenderer( {

boxZIndex: 4,
    boxName: 'border',

/**
     * Lookup table of elements which cannot take custom children.
     */
    childlessElements: {
        'TABLE':1, //can obviously have children but not custom ones
        'INPUT':1,
        'TEXTAREA':1,
        'SELECT':1,
        'OPTION':1,
        'IMG':1,
        'HR':1,
        'FIELDSET':1 //can take children but wrapping its children messes up its <legend>
    },

/**
     * Values of the type attribute for input elements displayed as buttons
     */
    inputButtonTypes: {
        'submit':1,
        'button':1,
        'reset':1
    },

needsUpdate: function() {
        var si = this.styleInfos;
        return si.borderInfo.changed() || si.borderRadiusInfo.changed();
    },

isActive: function() {
        var si = this.styleInfos;
        return ( si.borderImageInfo.isActive() ||
                 si.borderRadiusInfo.isActive() ||
                 si.backgroundInfo.isActive() ) &&
               si.borderInfo.isActive(); //check BorderStyleInfo last because it's the most expensive
    },

updateSize: function() {
        if( this.isActive() ) {
            this.drawBorder();
        }
    },

updateProps: function() {
        this.destroy();
        if( this.isActive() ) {
            this.drawBorder();
        }
    },

/**
     * Draw the border shape(s)
     */
    drawBorder: function() {
        var el = this.targetElement,
            cs = el.currentStyle,
            props = this.styleInfos.borderInfo.getProps(),
            bounds = this.boundsInfo.getBounds(),
            w = bounds.w,
            h = bounds.h,
            side, shape, stroke, s,
            segments, seg, i, len;

if( props ) {
            this.hideBorder();

segments = this.getBorderSegments( 2 );
            for( i = 0, len = segments.length; i < len; i++) {
                seg = segments[i];
                shape = this.getShape( 'borderPiece' + i, seg.stroke ? 'stroke' : 'fill', this.getBox() );
                shape.coordsize = w * 2 + ',' + h * 2;
                shape.coordorigin = '1,1';
                shape.path = seg.path;
                s = shape.style;
                s.width = w;
                s.height = h;

shape.filled = !!seg.fill;
                shape.stroked = !!seg.stroke;
                if( seg.stroke ) {
                    stroke = shape.stroke;
                    stroke['weight'] = seg.weight + 'px';
                    stroke.color = seg.color.value( el );
                    stroke['dashstyle'] = seg.stroke === 'dashed' ? '2 2' : seg.stroke === 'dotted' ? '1 1' : 'solid';
                    stroke['linestyle'] = seg.stroke === 'double' && seg.weight > 2 ? 'ThinThin' : 'Single';
                } else {
                    shape.fill.color = seg.fill.value( el );
                }
            }

// remove any previously-created border shapes which didn't get used above
            while( this.deleteShape( 'borderPiece' + i++ ) ) {}
        }
    },

/**
     * Hide the actual border of the element. In IE7 and up we can just set its color to transparent;
     * however IE6 does not support transparent borders so we have to get tricky with it. Also, some elements
     * like form buttons require removing the border width altogether, so for those we increase the padding
     * by the border size.
     */
    hideBorder: function() {
        var el = this.targetElement,
            cs = el.currentStyle,
            rs = el.runtimeStyle,
            tag = el.tagName,
            isIE6 = PIE.ieVersion === 6,
            sides, side, i;

if( ( isIE6 && tag in this.childlessElements ) || tag === 'BUTTON' ||
                ( tag === 'INPUT' && el.type in this.inputButtonTypes ) ) {
            rs.borderWidth = '';
            sides = this.styleInfos.borderInfo.sides;
            for( i = sides.length; i--; ) {
                side = sides[ i ];
                rs[ 'padding' + side ] = '';
                rs[ 'padding' + side ] = ( new PIE.Length( cs[ 'padding' + side ] ) ).pixels( el ) +
                                         ( new PIE.Length( cs[ 'border' + side + 'Width' ] ) ).pixels( el ) +
                                         ( !PIE.ieVersion === 8 && i % 2 ? 1 : 0 ); //needs an extra horizontal pixel to counteract the extra "inner border" going away
            }
            rs.borderWidth = 0;
        }
        else if( isIE6 ) {
            // Wrap all the element's children in a custom element, set the element to visiblity:hidden,
            // and set the wrapper element to visiblity:visible. This hides the outer element's decorations
            // (background and border) but displays all the contents.
            // TODO find a better way to do this that doesn't mess up the DOM parent-child relationship,
            // as this can interfere with other author scripts which add/modify/delete children. Also, this
            // won't work for elements which cannot take children, e.g. input/button/textarea/img/etc. Look into
            // using a compositor filter or some other filter which masks the border.
            if( el.childNodes.length !== 1 || el.firstChild.tagName !== 'ie6-mask' ) {
                var cont = doc.createElement( 'ie6-mask' ),
                    s = cont.style, child;
                s.visibility = 'visible';
                s.zoom = 1;
                while( child = el.firstChild ) {
                    cont.appendChild( child );
                }
                el.appendChild( cont );
                rs.visibility = 'hidden';
            }
        }
        else {
            rs.borderColor = 'transparent';
        }
    },

/**
     * Get the VML path definitions for the border segment(s).
     * @param {number=} mult If specified, all coordinates will be multiplied by this number
     * @return {Array.<string>}
     */
    getBorderSegments: function( mult ) {
        var el = this.targetElement,
            bounds, elW, elH,
            borderInfo = this.styleInfos.borderInfo,
            segments = [],
            floor, ceil, wT, wR, wB, wL,
            round = Math.round,
            borderProps, radiusInfo, radii, widths, styles, colors;

if( borderInfo.isActive() ) {
            borderProps = borderInfo.getProps();

widths = borderProps.widths;
            styles = borderProps.styles;
            colors = borderProps.colors;

if( borderProps.widthsSame && borderProps.stylesSame && borderProps.colorsSame ) {
                if( colors['t'].alpha() > 0 ) {
                    // shortcut for identical border on all sides - only need 1 stroked shape
                    wT = widths['t'].pixels( el ); //thickness
                    wR = wT / 2; //shrink
                    segments.push( {
                        path: this.getBoxPath( { t: wR, r: wR, b: wR, l: wR }, mult ),
                        stroke: styles['t'],
                        color: colors['t'],
                        weight: wT
                    } );
                }
            }
            else {
                mult = mult || 1;
                bounds = this.boundsInfo.getBounds();
                elW = bounds.w;
                elH = bounds.h;

wT = round( widths['t'].pixels( el ) );
                wR = round( widths['r'].pixels( el ) );
                wB = round( widths['b'].pixels( el ) );
                wL = round( widths['l'].pixels( el ) );
                var pxWidths = {
                    't': wT,
                    'r': wR,
                    'b': wB,
                    'l': wL
                };

radiusInfo = this.styleInfos.borderRadiusInfo;
                if( radiusInfo.isActive() ) {
                    radii = this.getRadiiPixels( radiusInfo.getProps() );
                }

floor = Math.floor;
                ceil = Math.ceil;

function radius( xy, corner ) {
                    return radii ? radii[ xy ][ corner ] : 0;
                }

function curve( corner, shrinkX, shrinkY, startAngle, ccw, doMove ) {
                    var rx = radius( 'x', corner),
                        ry = radius( 'y', corner),
                        deg = 65535,
                        isRight = corner.charAt( 1 ) === 'r',
                        isBottom = corner.charAt( 0 ) === 'b';
                    return ( rx > 0 && ry > 0 ) ?
                                ( doMove ? 'al' : 'ae' ) +
                                ( isRight ? ceil( elW - rx ) : floor( rx ) ) * mult + ',' + // center x
                                ( isBottom ? ceil( elH - ry ) : floor( ry ) ) * mult + ',' + // center y
                                ( floor( rx ) - shrinkX ) * mult + ',' + // width
                                ( floor( ry ) - shrinkY ) * mult + ',' + // height
                                ( startAngle * deg ) + ',' + // start angle
                                ( 45 * deg * ( ccw ? 1 : -1 ) // angle change
                            ) : (
                                ( doMove ? 'm' : 'l' ) +
                                ( isRight ? elW - shrinkX : shrinkX ) * mult + ',' +
                                ( isBottom ? elH - shrinkY : shrinkY ) * mult
                            );
                }

function line( side, shrink, ccw, doMove ) {
                    var
                        start = (
                            side === 't' ?
                                floor( radius( 'x', 'tl') ) * mult + ',' + ceil( shrink ) * mult :
                            side === 'r' ?
                                ceil( elW - shrink ) * mult + ',' + floor( radius( 'y', 'tr') ) * mult :
                            side === 'b' ?
                                ceil( elW - radius( 'x', 'br') ) * mult + ',' + floor( elH - shrink ) * mult :
                            // side === 'l' ?
                                floor( shrink ) * mult + ',' + ceil( elH - radius( 'y', 'bl') ) * mult
                        ),
                        end = (
                            side === 't' ?
                                ceil( elW - radius( 'x', 'tr') ) * mult + ',' + ceil( shrink ) * mult :
                            side === 'r' ?
                                ceil( elW - shrink ) * mult + ',' + ceil( elH - radius( 'y', 'br') ) * mult :
                            side === 'b' ?
                                floor( radius( 'x', 'bl') ) * mult + ',' + floor( elH - shrink ) * mult :
                            // side === 'l' ?
                                floor( shrink ) * mult + ',' + floor( radius( 'y', 'tl') ) * mult
                        );
                    return ccw ? ( doMove ? 'm' + end : '' ) + 'l' + start :
                                 ( doMove ? 'm' + start : '' ) + 'l' + end;
                }

function addSide( side, sideBefore, sideAfter, cornerBefore, cornerAfter, baseAngle ) {
                    var vert = side === 'l' || side === 'r',
                        sideW = pxWidths[ side ],
                        beforeX, beforeY, afterX, afterY;

if( sideW > 0 && styles[ side ] !== 'none' && colors[ side ].alpha() > 0 ) {
                        beforeX = pxWidths[ vert ? side : sideBefore ];
                        beforeY = pxWidths[ vert ? sideBefore : side ];
                        afterX = pxWidths[ vert ? side : sideAfter ];
                        afterY = pxWidths[ vert ? sideAfter : side ];

if( styles[ side ] === 'dashed' || styles[ side ] === 'dotted' ) {
                            segments.push( {
                                path: curve( cornerBefore, beforeX, beforeY, baseAngle + 45, 0, 1 ) +
                                      curve( cornerBefore, 0, 0, baseAngle, 1, 0 ),
                                fill: colors[ side ]
                            } );
                            segments.push( {
                                path: line( side, sideW / 2, 0, 1 ),
                                stroke: styles[ side ],
                                weight: sideW,
                                color: colors[ side ]
                            } );
                            segments.push( {
                                path: curve( cornerAfter, afterX, afterY, baseAngle, 0, 1 ) +
                                      curve( cornerAfter, 0, 0, baseAngle - 45, 1, 0 ),
                                fill: colors[ side ]
                            } );
                        }
                        else {
                            segments.push( {
                                path: curve( cornerBefore, beforeX, beforeY, baseAngle + 45, 0, 1 ) +
                                      line( side, sideW, 0, 0 ) +
                                      curve( cornerAfter, afterX, afterY, baseAngle, 0, 0 ) +

( styles[ side ] === 'double' && sideW > 2 ?
                                              curve( cornerAfter, afterX - floor( afterX / 3 ), afterY - floor( afterY / 3 ), baseAngle - 45, 1, 0 ) +
                                              line( side, ceil( sideW / 3 * 2 ), 1, 0 ) +
                                              curve( cornerBefore, beforeX - floor( beforeX / 3 ), beforeY - floor( beforeY / 3 ), baseAngle, 1, 0 ) +
                                              'x ' +
                                              curve( cornerBefore, floor( beforeX / 3 ), floor( beforeY / 3 ), baseAngle + 45, 0, 1 ) +
                                              line( side, floor( sideW / 3 ), 1, 0 ) +
                                              curve( cornerAfter, floor( afterX / 3 ), floor( afterY / 3 ), baseAngle, 0, 0 )
                                          : '' ) +

curve( cornerAfter, 0, 0, baseAngle - 45, 1, 0 ) +
                                      line( side, 0, 1, 0 ) +
                                      curve( cornerBefore, 0, 0, baseAngle, 1, 0 ),
                                fill: colors[ side ]
                            } );
                        }
                    }
                }

addSide( 't', 'l', 'r', 'tl', 'tr', 90 );
                addSide( 'r', 't', 'b', 'tr', 'br', 0 );
                addSide( 'b', 'r', 'l', 'br', 'bl', -90 );
                addSide( 'l', 'b', 't', 'bl', 'tl', -180 );
            }
        }

return segments;
    },

destroy: function() {
        PIE.RendererBase.destroy.call( this );
        this.targetElement.runtimeStyle.borderColor = '';
    }

} );
/**
 * Renderer for border-image
 * @constructor
 * @param {Element} el The target element
 * @param {Object} styleInfos The StyleInfo objects
 * @param {PIE.RootRenderer} parent
 */
PIE.BorderImageRenderer = PIE.RendererBase.newRenderer( {

boxZIndex: 5,
    pieceNames: [ 't', 'tr', 'r', 'br', 'b', 'bl', 'l', 'tl', 'c' ],

needsUpdate: function() {
        var si = this.styleInfos;
        return si.borderImageInfo.changed() || si.borderImageInfo.changed();
    },

isActive: function() {
        return this.styleInfos.borderImageInfo.isActive();
    },

updateSize: function() {
        if( this.isActive() ) {
            var props = this.styleInfos.borderImageInfo.getProps(),
                bounds = this.boundsInfo.getBounds(),
                box = this.getBox(), //make sure pieces are created
                el = this.targetElement,
                pieces = this.pieces;

PIE.Util.withImageSize( props.src, function( imgSize ) {
                var elW = bounds.w,
                    elH = bounds.h,

widths = props.width,
                    widthT = widths.t.pixels( el ),
                    widthR = widths.r.pixels( el ),
                    widthB = widths.b.pixels( el ),
                    widthL = widths.l.pixels( el ),
                    slices = props.slice,
                    sliceT = slices.t.pixels( el ),
                    sliceR = slices.r.pixels( el ),
                    sliceB = slices.b.pixels( el ),
                    sliceL = slices.l.pixels( el );

// Piece positions and sizes
                function setSizeAndPos( piece, w, h, x, y ) {
                    var s = pieces[piece].style;
                    s.width = w;
                    s.height = h;
                    s.left = x;
                    s.top = y;
                }
                setSizeAndPos( 'tl', widthL, widthT, 0, 0 );
                setSizeAndPos( 't', elW - widthL - widthR, widthT, widthL, 0 );
                setSizeAndPos( 'tr', widthR, widthT, elW - widthR, 0 );
                setSizeAndPos( 'r', widthR, elH - widthT - widthB, elW - widthR, widthT );
                setSizeAndPos( 'br', widthR, widthB, elW - widthR, elH - widthB );
                setSizeAndPos( 'b', elW - widthL - widthR, widthB, widthL, elH - widthB );
                setSizeAndPos( 'bl', widthL, widthB, 0, elH - widthB );
                setSizeAndPos( 'l', widthL, elH - widthT - widthB, 0, widthT );
                setSizeAndPos( 'c', elW - widthL - widthR, elH - widthT - widthB, widthL, widthT );

// image croppings
                function setCrops( sides, crop, val ) {
                    for( var i=0, len=sides.length; i < len; i++ ) {
                        pieces[ sides[i] ]['imagedata'][ crop ] = val;
                    }
                }

// corners
                setCrops( [ 'tl', 't', 'tr' ], 'cropBottom', ( imgSize.h - sliceT ) / imgSize.h );
                setCrops( [ 'tl', 'l', 'bl' ], 'cropRight', ( imgSize.w - sliceL ) / imgSize.w );
                setCrops( [ 'bl', 'b', 'br' ], 'cropTop', ( imgSize.h - sliceB ) / imgSize.h );
                setCrops( [ 'tr', 'r', 'br' ], 'cropLeft', ( imgSize.w - sliceR ) / imgSize.w );

// edges and center
                if( props.repeat.v === 'stretch' ) {
                    setCrops( [ 'l', 'r', 'c' ], 'cropTop', sliceT / imgSize.h );
                    setCrops( [ 'l', 'r', 'c' ], 'cropBottom', sliceB / imgSize.h );
                }
                if( props.repeat.h === 'stretch' ) {
                    setCrops( [ 't', 'b', 'c' ], 'cropLeft', sliceL / imgSize.w );
                    setCrops( [ 't', 'b', 'c' ], 'cropRight', sliceR / imgSize.w );
                }

// center fill
                pieces['c'].style.display = props.fill ? '' : 'none';
            }, this );
        } else {
            this.destroy();
        }
    },

updateProps: function() {
        this.destroy();
        if( this.isActive() ) {
            this.updateSize();
        }
    },

getBox: function() {
        var box = this._box, s, piece, i,
            pieceNames = this.pieceNames,
            len = pieceNames.length;

if( !box ) {
            box = this._box = doc.createElement( 'border-image' );
            s = box.style;
            s.position = 'absolute';

this.pieces = {};

for( i = 0; i < len; i++ ) {
                piece = this.pieces[ pieceNames[i] ] = PIE.Util.createVmlElement( 'rect' );
                piece.appendChild( PIE.Util.createVmlElement( 'imagedata' ) );
                s = piece.style;
                s['behavior'] = 'url(#default#VML)';
                s.position = "absolute";
                s.top = s.left = 0;
                piece['imagedata'].src = this.styleInfos.borderImageInfo.getProps().src;
                piece.stroked = false;
                piece.filled = false;
                box.appendChild( piece );
            }

this.parent.addLayer( this.boxZIndex, box )
        }

return box;
    }

} );
/**
 * Renderer for outset box-shadows
 * @constructor
 * @param {Element} el The target element
 * @param {Object} styleInfos The StyleInfo objects
 * @param {PIE.RootRenderer} parent
 */
PIE.BoxShadowOutsetRenderer = PIE.RendererBase.newRenderer( {

boxZIndex: 1,
    boxName: 'outset-box-shadow',

needsUpdate: function() {
        var si = this.styleInfos;
        return si.boxShadowInfo.changed() || si.borderRadiusInfo.changed();
    },

isActive: function() {
        var boxShadowInfo = this.styleInfos.boxShadowInfo;
        return boxShadowInfo.isActive() && boxShadowInfo.getProps().outset[0];
    },

updateSize: function() {
        if( this.isActive() ) {
            var me = this,
                el = this.targetElement,
                box = this.getBox(),
                styleInfos = this.styleInfos,
                shadowInfos = styleInfos.boxShadowInfo.getProps().outset,
                radii = styleInfos.borderRadiusInfo.getProps(),
                len = shadowInfos.length,
                i = len, j,
                bounds = this.boundsInfo.getBounds(),
                w = bounds.w,
                h = bounds.h,
                clipAdjust = PIE.ieVersion === 8 ? 1 : 0, //workaround for IE8 bug where VML leaks out top/left of clip region by 1px
                corners = [ 'tl', 'tr', 'br', 'bl' ], corner,
                shadowInfo, shape, fill, ss, xOff, yOff, spread, blur, shrink, color, alpha, path,
                totalW, totalH, focusX, focusY, isBottom, isRight;

function getShadowShape( index, corner, xOff, yOff, color, blur, path ) {
                var shape = me.getShape( 'shadow' + index + corner, 'fill', box, len - index ),
                    fill = shape.fill;

// Position and size
                shape['coordsize'] = w * 2 + ',' + h * 2;
                shape['coordorigin'] = '1,1';

// Color and opacity
                shape['stroked'] = false;
                shape['filled'] = true;
                fill.color = color.value( el );
                if( blur ) {
                    fill['type'] = 'gradienttitle'; //makes the VML gradient follow the shape's outline - hooray for undocumented features?!?!
                    fill['color2'] = fill.color;
                    fill['opacity'] = 0;
                }

// Path
                shape.path = path;

// This needs to go last for some reason, to prevent rendering at incorrect size
                ss = shape.style;
                ss.left = xOff;
                ss.top = yOff;
                ss.width = w;
                ss.height = h;

return shape;
            }

while( i-- ) {
                shadowInfo = shadowInfos[ i ];
                xOff = shadowInfo.xOffset.pixels( el );
                yOff = shadowInfo.yOffset.pixels( el );
                spread = shadowInfo.spread.pixels( el ),
                blur = shadowInfo.blur.pixels( el );
                color = shadowInfo.color;
                // Shape path
                shrink = -spread - blur;
                if( !radii && blur ) {
                    // If blurring, use a non-null border radius info object so that getBoxPath will
                    // round the corners of the expanded shadow shape rather than squaring them off.
                    radii = PIE.BorderRadiusStyleInfo.ALL_ZERO;
                }
                path = this.getBoxPath( { t: shrink, r: shrink, b: shrink, l: shrink }, 2, radii );

if( blur ) {
                    totalW = ( spread + blur ) * 2 + w;
                    totalH = ( spread + blur ) * 2 + h;
                    focusX = blur * 2 / totalW;
                    focusY = blur * 2 / totalH;
                    if( blur - spread > w / 2 || blur - spread > h / 2 ) {
                        // If the blur is larger than half the element's narrowest dimension, we cannot do
                        // this with a single shape gradient, because its focussize would have to be less than
                        // zero which results in ugly artifacts. Instead we create four shapes, each with its
                        // gradient focus past center, and then clip them so each only shows the quadrant
                        // opposite the focus.
                        for( j = 4; j--; ) {
                            corner = corners[j];
                            isBottom = corner.charAt( 0 ) === 'b';
                            isRight = corner.charAt( 1 ) === 'r';
                            shape = getShadowShape( i, corner, xOff, yOff, color, blur, path );
                            fill = shape.fill;
                            fill['focusposition'] = ( isRight ? 1 - focusX : focusX ) + ',' +
                                                    ( isBottom ? 1 - focusY : focusY );
                            fill['focussize'] = '0,0';

// Clip to show only the appropriate quadrant. Add 1px to the top/left clip values
                            // in IE8 to prevent a bug where IE8 displays one pixel outside the clip region.
                            shape.style.clip = 'rect(' + ( ( isBottom ? totalH / 2 : 0 ) + clipAdjust ) + 'px,' +
                                                         ( isRight ? totalW : totalW / 2 ) + 'px,' +
                                                         ( isBottom ? totalH : totalH / 2 ) + 'px,' +
                                                         ( ( isRight ? totalW / 2 : 0 ) + clipAdjust ) + 'px)';
                        }
                    } else {
                        // TODO delete old quadrant shapes if resizing expands past the barrier
                        shape = getShadowShape( i, '', xOff, yOff, color, blur, path );
                        fill = shape.fill;
                        fill['focusposition'] = focusX + ',' + focusY;
                        fill['focussize'] = ( 1 - focusX * 2 ) + ',' + ( 1 - focusY * 2 );
                    }
                } else {
                    shape = getShadowShape( i, '', xOff, yOff, color, blur, path );
                    alpha = color.alpha();
                    if( alpha < 1 ) {
                        // shape.style.filter = 'alpha(opacity=' + ( alpha * 100 ) + ')';
                        // ss.filter = 'progid:DXImageTransform.Microsoft.BasicImage(opacity=' + ( alpha  ) + ')';
                        shape.fill.opacity = alpha;
                    }
                }
            }
        } else {
            this.destroy();
        }
    },

updateProps: function() {
        this.destroy();
        this.updateSize();
    }

} );
/**
 * Renderer for inset box-shadows
 * @constructor
 * @param {Element} el The target element
 * @param {Object} styleInfos The StyleInfo objects
 * @param {PIE.RootRenderer} parent
 */
PIE.BoxShadowInsetRenderer = PIE.RendererBase.newRenderer( {

boxZIndex: 3,
    boxName: 'inset-box-shadow',

needsUpdate: function() {
        var si = this.styleInfos;
        return si.boxShadowInfo.changed() || si.borderRadiusInfo.changed();
    },

isActive: function() {
        var boxShadowInfo = this.styleInfos.boxShadowInfo;
        return boxShadowInfo.isActive() && boxShadowInfo.getProps().inset[0];
    },

updateSize: function() {
        // TODO
    },

updateProps: function() {
        // TODO
    }
    
} );
PIE.Element = (function() {

var wrappers = {},
        lazyInitCssProp = PIE.CSS_PREFIX + 'lazy-init',
        ignorePropertyNames = { 'background':1, 'bgColor':1 };

function Element( el ) {
        var renderers,
            boundsInfo = new PIE.BoundsInfo( el ),
            styleInfos,
            styleInfosArr,
            ancestors,
            initializing,
            initialized,
            eventsAttached,
            delayed,
            destroyed;

/**
         * Initialize PIE for this element.
         */
        function init() {
            if( !initialized ) {
                var docEl,
                    bounds,
                    lazy = el.currentStyle.getAttribute( lazyInitCssProp ) === 'true',
                    rootRenderer;

// Force layout so move/resize events will fire. Set this as soon as possible to avoid layout changes
                // after load, but make sure it only gets called the first time through to avoid recursive calls to init().
                if( !initializing ) {
                    initializing = 1;
                    el.runtimeStyle.zoom = 1;
                    initFirstChildPseudoClass();
                }

boundsInfo.lock();

// If the -pie-lazy-init:true flag is set, check if the element is outside the viewport and if so, delay initialization
                if( lazy && ( bounds = boundsInfo.getBounds() ) && ( docEl = doc.documentElement || doc.body ) &&
                        ( bounds.y > docEl.clientHeight || bounds.x > docEl.clientWidth || bounds.y + bounds.h < 0 || bounds.x + bounds.w < 0 ) ) {
                    if( !delayed ) {
                        delayed = 1;
                        PIE.OnScroll.observe( init );
                    }
                } else {
                    initialized = 1;
                    delayed = initializing = 0;
                    PIE.OnScroll.unobserve( init );

// Create the style infos and renderers
                    styleInfos = {
                        backgroundInfo: new PIE.BackgroundStyleInfo( el ),
                        borderInfo: new PIE.BorderStyleInfo( el ),
                        borderImageInfo: new PIE.BorderImageStyleInfo( el ),
                        borderRadiusInfo: new PIE.BorderRadiusStyleInfo( el ),
                        boxShadowInfo: new PIE.BoxShadowStyleInfo( el ),
                        visibilityInfo: new PIE.VisibilityStyleInfo( el )
                    };
                    styleInfosArr = [
                        styleInfos.backgroundInfo,
                        styleInfos.borderInfo,
                        styleInfos.borderImageInfo,
                        styleInfos.borderRadiusInfo,
                        styleInfos.boxShadowInfo,
                        styleInfos.visibilityInfo
                    ];

rootRenderer = new PIE.RootRenderer( el, boundsInfo, styleInfos );
                    var childRenderers = [
                        new PIE.BoxShadowOutsetRenderer( el, boundsInfo, styleInfos, rootRenderer ),
                        new PIE.BackgroundRenderer( el, boundsInfo, styleInfos, rootRenderer ),
                        new PIE.BoxShadowInsetRenderer( el, boundsInfo, styleInfos, rootRenderer ),
                        new PIE.BorderRenderer( el, boundsInfo, styleInfos, rootRenderer ),
                        new PIE.BorderImageRenderer( el, boundsInfo, styleInfos, rootRenderer )
                    ];
                    rootRenderer.childRenderers = childRenderers; // circular reference, can't pass in constructor; TODO is there a cleaner way?
                    renderers = [ rootRenderer ].concat( childRenderers );

// Add property change listeners to ancestors if requested
                    initAncestorPropChangeListeners();

// Add to list of polled elements in IE8
                    if( PIE.ie8DocMode === 8 ) {
                        PIE.Heartbeat.observe( update );
                    }

// Trigger rendering
                    update();
                }

if( !eventsAttached ) {
                    eventsAttached = 1;
                    el.attachEvent( 'onmove', handleMoveOrResize );
                    el.attachEvent( 'onresize', handleMoveOrResize );
                    el.attachEvent( 'onpropertychange', propChanged );
                    el.attachEvent( 'onmouseenter', mouseEntered );
                    el.attachEvent( 'onmouseleave', mouseLeft );
                    PIE.OnResize.observe( handleMoveOrResize );
                }

boundsInfo.unlock();
            }
        }

/**
         * Event handler for onmove and onresize events. Invokes update() only if the element's
         * bounds have previously been calculated, to prevent multiple runs during page load when
         * the element has no initial CSS3 properties.
         */
        function handleMoveOrResize() {
            if( boundsInfo && boundsInfo.hasBeenQueried() ) {
                update();
            }
        }

/**
         * Update position and/or size as necessary. Both move and resize events call
         * this rather than the updatePos/Size functions because sometimes, particularly
         * during page load, one will fire but the other won't.
         */
        function update() {
            if( initialized ) {
                if( !destroyed ) {
                    var i, len;

boundsInfo.lock();
                    for( i = styleInfosArr.length; i--; ) {
                        styleInfosArr[i].lock();
                    }
                    if( boundsInfo.positionChanged() ) {
                        /* TODO just using getBoundingClientRect (used internally by BoundsInfo) for detecting
                           position changes may not always be accurate; it's possible that
                           an element will actually move relative to its positioning parent, but its position
                           relative to the viewport will stay the same. Need to come up with a better way to
                           track movement. The most accurate would be the same logic used in RootRenderer.updatePos()
                           but that is a more expensive operation since it does some DOM walking, and we want this
                           check to be as fast as possible. */
                        for( i = 0, len = renderers.length; i < len; i++ ) {
                            renderers[i].updatePos();
                        }
                    }
                    if( boundsInfo.sizeChanged() ) {
                        for( i = 0, len = renderers.length; i < len; i++ ) {
                            renderers[i].updateSize();
                        }
                    }
                    for( i = styleInfosArr.length; i--; ) {
                        styleInfosArr[i].unlock();
                    }
                    boundsInfo.unlock();
                }
            }
            else if( !initializing ) {
                init();
            }
        }

/**
         * Handle property changes to trigger update when appropriate.
         */
        function propChanged() {
            // Some elements like <table> fire onpropertychange events for old-school background properties
            // ('background', 'bgColor') when runtimeStyle background properties are changed, which
            // results in an infinite loop; therefore we filter out those property names.
            if( !( event && event.propertyName in ignorePropertyNames ) ) {
                if( initialized ) {
                    var i, len,
                        toUpdate = [];

boundsInfo.lock();

for( i = 0, len = renderers.length; i < len; i++ ) {
                        // Make sure position is synced if the element hasn't already been renderered.
                        // TODO this feels sloppy - look into merging propChanged and update functions
                        if( !renderers[i].isPositioned ) {
                            renderers[i].updatePos();
                        }
                        if( renderers[i].needsUpdate() ) {
                            toUpdate.push( renderers[i] );
                        }
                    }
                    for( i = 0, len = toUpdate.length; i < len; i++ ) {
                        toUpdate[i].updateProps();
                    }

boundsInfo.unlock();
                }
                else if( !initializing ) {
                    init();
                }
            }
        }

/**
         * Handle mouseenter events. Adds a custom class to the element to allow IE6 to add
         * hover styles to non-link elements.
         */
        function mouseEntered() {
            if( PIE.ieVersion === 6 && el.tagName !== 'A' ) {
                el.className += ' ' + PIE.CLASS_PREFIX + 'hover';
            }
            //must delay this because the mouseleave event fires before the :hover styles are added.
            setTimeout( propChanged, 0 );
        }

/**
         * Handle mouseleave events
         */
        function mouseLeft() {
            if( PIE.ieVersion === 6 && el.tagName !== 'A' ) {
                el.className = el.className.replace( PIE.hoverClassRE, '' );
            }
            //must delay this because the mouseleave event fires before the :hover styles are removed.
            setTimeout( propChanged, 0 );
        }

/**
         * Handle property changes on ancestors of the element; see initAncestorPropChangeListeners()
         * which adds these listeners as requested with the -pie-watch-ancestors CSS property.
         */
        function ancestorPropChanged() {
            var name = event.propertyName;
            if( name === 'className' || name === 'id' ) {
                propChanged();
            }
        }

/**
         * Clean everything up when the behavior is removed from the element, or the element
         * is destroyed.
         */
        function destroy() {
            var i, len;

destroyed = 1;

// destroy any active renderers
            if( renderers ) {
                for( i = 0, len = renderers.length; i < len; i++ ) {
                    renderers[i].destroy();
                }
            }

// remove any ancestor propertychange listeners
            if( ancestors ) {
                for( i = 0, len = ancestors.length; i < len; i++ ) {
                    ancestors[i].detachEvent( 'onpropertychange', ancestorPropChanged );
                    ancestors[i].detachEvent( 'onmouseenter', mouseEntered );
                    ancestors[i].detachEvent( 'onmouseleave', mouseLeft );
                }
            }

// Remove from list of polled elements in IE8
            if( PIE.ie8DocMode === 8 ) {
                PIE.Heartbeat.unobserve( update );
            }
            // Stop onscroll/onresize listening
            PIE.OnScroll.unobserve( update );
            PIE.OnResize.unobserve( update );

// Remove event listeners
            el.detachEvent( 'onmove', update );
            el.detachEvent( 'onresize', update );
            el.detachEvent( 'onpropertychange', propChanged );
            el.detachEvent( 'onmouseenter', mouseEntered );
            el.detachEvent( 'onmouseleave', mouseLeft );

// Kill objects
            renderers = boundsInfo = styleInfos = styleInfosArr = ancestors = null;
        }

/**
         * If requested via the custom -pie-watch-ancestors CSS property, add onpropertychange listeners
         * to ancestor(s) of the element so we can pick up style changes based on CSS rules using
         * descendant selectors.
         */
        function initAncestorPropChangeListeners() {
            var watch = el.currentStyle.getAttribute( PIE.CSS_PREFIX + 'watch-ancestors' ),
                i, a;
            if( watch ) {
                ancestors = [];
                watch = parseInt( watch, 10 );
                i = 0;
                a = el.parentNode;
                while( a && ( watch === 'NaN' || i++ < watch ) ) {
                    ancestors.push( a );
                    a.attachEvent( 'onpropertychange', ancestorPropChanged );
                    a.attachEvent( 'onmouseenter', mouseEntered );
                    a.attachEvent( 'onmouseleave', mouseLeft );
                    a = a.parentNode;
                }
            }
        }

/**
         * If the target element is a first child, add a pie_first-child class to it. This allows using
         * the added class as a workaround for the fact that PIE's rendering element breaks the :first-child
         * pseudo-class selector.
         */
        function initFirstChildPseudoClass() {
            var tmpEl = el,
                isFirst = 1;
            while( tmpEl = tmpEl.previousSibling ) {
                if( tmpEl.nodeType === 1 ) {
                    isFirst = 0;
                    break;
                }
            }
            if( isFirst ) {
                el.className += ' ' + PIE.CLASS_PREFIX + 'first-child';
            }
        }

// Public methods - these are all already bound to this instance so there's no need to wrap them
        // in a closure to maintain the 'this' scope object.
        this.init = init;
        this.update = update;
        this.destroy = destroy;
    }

Element.getInstance = function( el ) {
        var id = PIE.Util.getUID( el );
        return wrappers[ id ] || ( wrappers[ id ] = new Element( el ) );
    };

Element.destroy = function( el ) {
        var id = PIE.Util.getUID( el ),
            wrapper = wrappers[ id ];
        if( wrapper ) {
            wrapper.destroy();
            delete wrappers[ id ];
        }
    };

// Destroy all Element objects when leaving the page
    window.attachEvent( 'onbeforeunload', function() {
        if( wrappers ) {
            for( var w in wrappers ) {
                if( wrappers.hasOwnProperty( w ) ) {
                    wrappers[ w ].destroy();
                }
            }
        }
    } );

return Element;
})();

/*
 * This file exposes the public API for invoking PIE.
 */

/**
 * Programatically attach PIE to a single element.
 * @param {Element} el
 */
PIE[ 'attach' ] = function( el ) {
    PIE.Element.getInstance( el ).init();
};

/**
 * Programatically detach PIE from a single element.
 * @param {Element} el
 */
PIE[ 'detach' ] = function( el ) {
    PIE.Element.destroy( el );
};

} // if( !PIE )
var p = window.PIE;

function init() {
    p.attach( element );
}

function cleanup() {
    p.detach( element );
}

if( element.readyState === 'complete' ) {
    init();
}
    </script>

</PUBLIC:COMPONENT>