<!-- background-size-polyfill v0.2.0 | (c) 2012-2013 Louis-Rémi Babé | MIT License -->
<PUBLIC:COMPONENT lightWeight="true">
    <PUBLIC:ATTACH EVENT="oncontentready" ONEVENT="o.init()" />
    <PUBLIC:ATTACH EVENT="ondocumentready" ONEVENT="o.init()" />
    <PUBLIC:ATTACH EVENT="onpropertychange" ONEVENT="o.handlePropertychange()" />
    <PUBLIC:ATTACH EVENT="ondetach" ONEVENT="o.restore()" />
    <PUBLIC:ATTACH EVENT="onresize" FOR="window" ONEVENT="o.handleResize()" />
    <PUBLIC:EVENT NAME="onbackgroundupdate" ID="updateEvent" />
    <script type="text/javascript">

    var o; // and so it is

    (function( element, window ) {

        var rsrc = /url\(["']?(.*?)["']?\)/,
        rprespace = /^\s\s*/,
        rpostspace = /\s\s*$/,
        rmidspace = /\s\s*/g,
        rpercent = /%$/,
        positions = {
        top: 0,
        left: 0,
        bottom: 1,
        right: 1,
        center: 0.5
        },
    doc = element.document,
    spacer = "data:image/gif;base64,R0lGODlhAQABAIABAP///wAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==",
    wrapperClass = "background-size-polyfill",
    noop = function() {},
    resizeInterval = 100,
    resizeId,
    processSnapshotId,
    updateEventId,
    updateBackgroundCallbackId;

    // remove the background-image and emulate it with a wrapped <img/>
    function init() {
        var wrapper = doc.createElement( "div" ),
        img = doc.createElement( "img" ),
        wrapperStyle = wrapper.style,
        elementStyle = element.style,
        elementCurrentStyle = element.currentStyle,
        expando = element.bgsExpando,
        cloneWrapper = element.firstChild;

        if ( expando ) {
        if ( expando.restore ) {
        elementStyle.backgroundImage = expando.restore.backgroundImage;
        elementStyle.position = expando.restore.position;
        elementStyle.zIndex = expando.restore.zIndex;
        }

    if ( cloneWrapper &&
    ( cloneWrapper.nodeName || "" ).toUpperCase() === "DIV" &&
    cloneWrapper.className === wrapperClass) {
        element.removeChild( cloneWrapper );
        }
    }

    setStyles( wrapper );
    wrapper.className = wrapperClass;
    wrapperStyle.top =
    wrapperStyle.right =
    wrapperStyle.bottom =
    wrapperStyle.left = 0;
    wrapperStyle.position = "fixed"; // test value

    setStyles( img );
    img.alt = "";

    wrapper.appendChild( img );

    element.insertBefore( wrapper, element.firstChild );

    // save useful data for quick access
    element.bgsExpando = expando = {
        wrapper: wrapper,
        img: img,
        // styles to restore on detach
        restore: {
        backgroundImage: elementStyle.backgroundImage,
        position: elementStyle.position,
        zIndex: elementStyle.zIndex
        },
    current: {},       // current snapshot
    next: null,        // next snapshot to process
    processing: false, // whether we are in the middle of processing the next snapshot
    loadImg: null,     // temp img element/object from getImageDimensions
    display: false,    // element's display property
    changed: false,    // whether element's display property has changed
    ignore: false,     // whether to ignore the next property change event
    // whether we can support background-attachment: fixed for this element/browser
    canFixed: element.nodeName.toUpperCase() === "BODY" && wrapper.offsetHeight > 0
    };

    wrapperStyle.position = "absolute";

    // This is the part where we mess with the existing DOM
    // to make sure that the background image is correctly zIndexed
    if ( elementCurrentStyle.zIndex === "auto" ) {
        elementStyle.zIndex = 0;
        }
    if ( elementCurrentStyle.position === "static" ) {
        elementStyle.position = "relative";
        }

    o = {
        init: noop, // allow init() to be called only once
        handlePropertychange: handlePropertychange,
        restore: restore,
        handleResize: handleResize
        };

    handlePropertychange();
    }

    function setStyles( el ) {
        var style = el.style;

        style.position = "absolute";
        style.display = "block";
        style.zIndex = -1;
        style.overflow = "hidden";
        style.visibility = "inherit";
        style.width =
        style.height =
        style.top =
        style.right =
        style.bottom =
        style.left =
        style.cursor = "auto";
        style.margin =
        style.padding =
        style.border =
        style.outline =
        style.minWidth =
        style.minHeight = 0;
        style.background =
        style.maxWidth =
        style.maxHeight = "none";
        style.fontSize =
        style.lineHeight = "1em";
        }

    function getImageDimensions( expando, src, callback ) {
        var img;

        if ( src ) {
        img = doc.createElement( "img" );
        img.onload = img.onerror = function() {
        var width = this.width,
        height = this.height;
        if ( window.event.type === "error" ) {
        width = height = 0;
        }
    expando.loadImg = this.onload = this.onerror = null;
    callback( width, height );
    };
    img.src = src;

    } else {
        img = {
            callbackId: window.setTimeout( function() {
                expando.loadImg = null;
                callback( 0, 0 );
            }, 0 )
    };
    }

    expando.loadImg = img;
    img = null;
    }

    // this prevents handling propertychange events caused by this script
    function suspendPropertychange( callback ) {
        var fn = o.handlePropertychange;
        o.handlePropertychange = noop;
        callback();
        o.handlePropertychange = fn;
        }

    function refreshDisplay( element, expando ) {
        var display = element.currentStyle.display;

        if ( display !== expando.display ) {
        expando.display = display;
        expando.changed = true;
        }

    return display !== "none";
    }

    function takeSnapshot( element, expando ) {
        var elementStyle = element.style,
        elementCurrentStyle = element.currentStyle,
        expandoRestore = expando.restore,
        size = normalizeCSSValue( elementCurrentStyle["background-size"] ),
        sizeList = size.split( " " ),
        snapshot = {
        innerWidth: element.offsetWidth -
        ( parseFloat( elementCurrentStyle.borderLeftWidth ) || 0 ) -
        ( parseFloat( elementCurrentStyle.borderRightWidth ) || 0 ),
        innerHeight: element.offsetHeight -
        ( parseFloat( elementCurrentStyle.borderTopWidth ) || 0 ) -
        ( parseFloat( elementCurrentStyle.borderBottomWidth ) || 0 ),
        size: size,
        sizeIsKeyword: size === "contain" || size === "cover",
        sizeX: sizeList[0],
        sizeY: sizeList.length > 1 ? sizeList[1] : "auto",
        posX: elementCurrentStyle.backgroundPositionX,
        posY: elementCurrentStyle.backgroundPositionY,
        attachment: elementCurrentStyle.backgroundAttachment,
        src: "",
        imgWidth: 0,
        imgHeight: 0
        };

    // length / percentage size
    if ( !snapshot.sizeIsKeyword ) {
        // negative lengths or percentages are not allowed
        if ( !( ( parseFloat( snapshot.sizeX ) >= 0 || snapshot.sizeX === "auto" ) &&
        ( parseFloat( snapshot.sizeY ) >= 0 || snapshot.sizeY === "auto" ) ) ) {
        snapshot.sizeX = snapshot.sizeY = "auto";
        }

    // percentages are relative to the element, not image, width/height
    if ( rpercent.test( snapshot.sizeX ) ) {
        snapshot.sizeX = ( snapshot.innerWidth * parseFloat( snapshot.sizeX ) / 100 || 0 ) + "px";
        }
    if ( rpercent.test( snapshot.sizeY ) ) {
        snapshot.sizeY = ( snapshot.innerHeight * parseFloat( snapshot.sizeY ) / 100 || 0 ) + "px";
        }
    }

    // keyword / percentage positions
    if ( snapshot.posX in positions || rpercent.test( snapshot.posX ) ) {
        snapshot.posX = positions[ snapshot.posX ] || parseFloat( snapshot.posX ) / 100 || 0;
        }
    if ( snapshot.posY in positions || rpercent.test( snapshot.posY ) ) {
        snapshot.posY = positions[ snapshot.posY ] || parseFloat( snapshot.posY ) / 100 || 0;
        }

    // image
    if ( ( rsrc.exec( elementStyle.backgroundImage ) || [] )[1] === spacer ) {
        // inline style wasn't set, but a class change could change the background image
        // so restore the previous inline style before measuring
        suspendPropertychange( function() {
            elementStyle.backgroundImage = expandoRestore.backgroundImage;
        } );
    } else {
        // inline style was set, so save it in our restore list
        expandoRestore.backgroundImage = elementStyle.backgroundImage;
        }
    snapshot.src = ( rsrc.exec( elementCurrentStyle.backgroundImage ) || [] )[1];
    // set inline background image to the transparent spacer gif
    // this allows JavaScript to later set it to "none"
    suspendPropertychange( function() {
        elementStyle.backgroundImage = "url(" + spacer + ")";
        } );

    return snapshot;
    }

    function normalizeCSSValue( value ) {
        return String( value ).replace( rprespace, "" ).replace( rpostspace, "" ).replace( rmidspace, " " );
        }

    function processSnapshot( element, expando ) {
        var snapshot = expando.next;

        function loop() {
        processSnapshotId = window.setTimeout( function() {
        expando.processing = false;
        processSnapshot( element, expando );
        }, 0 );
    }

    if ( !expando.processing && snapshot ) {
        expando.next = null;
        expando.processing = true;

        getImageDimensions( expando, snapshot.src, function( width, height ) {
        snapshot.imgWidth = width;
        snapshot.imgHeight = height;

        if ( isChanged( expando, snapshot ) ) {
        updateBackground( element, expando, snapshot, loop );
        } else {
        loop();
        }
    } );
    }
    }

    function isChanged( expando, snapshot ) {
        var expandoCurrent = expando.current,
        changed = false,
        prop;

        if ( expando.changed ) {
        // display changed
        expando.changed = false;
        changed = true;

        } else {
        for ( prop in snapshot ) {
        if ( snapshot[prop] !== expandoCurrent[prop] ) {
        changed = true;
        break;
        }
    }
    }

    return changed;
    }

    function updateBackground( element, expando, snapshot, callback ) {
        var img = expando.img,
        imgStyle = img.style,
        size = snapshot.size,
        innerWidth = snapshot.innerWidth,
        innerHeight = snapshot.innerHeight,
        imgWidth = snapshot.imgWidth,
        imgHeight = snapshot.imgHeight,
        posX = snapshot.posX,
        posY = snapshot.posY,
        posXIsPercent = typeof posX === "number",
        posYIsPercent = typeof posY === "number",
        display = "none",
        left = 0,
        top = 0,
        width = "auto",
        height = "auto",
        px = "px",
        oneHundredPercent = "100%",
        elemRatio,
        imgRatio;

        if ( innerWidth && innerHeight && imgWidth && imgHeight ) {
        expando.wrapper.style.position =
        snapshot.attachment === "fixed" && expando.canFixed ?
        "fixed" : "absolute";

        img.src = snapshot.src;

        // can we do Math.round() instead of flooring towards zero?

        if ( snapshot.sizeIsKeyword ) {
        elemRatio = innerWidth / innerHeight;
        imgRatio = imgWidth / imgHeight;

        if ( ( size === "contain" && imgRatio > elemRatio ) ||
        ( size === "cover" && elemRatio > imgRatio ) ) {
        top = floorTowardsZero( ( innerHeight - innerWidth / imgRatio ) * posY ) + px;
        width = oneHundredPercent;

        // size === "contain" && elemRatio > imgRatio ||
        // size === "cover" && imgRatio > elemRatio
        } else {
        left = floorTowardsZero( ( innerWidth - innerHeight * imgRatio ) * posX ) + px;
        height = oneHundredPercent;
        }

    imgStyle.left = posXIsPercent ? left : posX;
    imgStyle.top = posYIsPercent ? top : posY;
    imgStyle.width = width;
    imgStyle.height = height;

    display = "block";

    } else {
        // need to set width/height then calculate left/top from the actual width/height
        imgStyle.display = "block";
        imgStyle.width = snapshot.sizeX;
        imgStyle.height = snapshot.sizeY;

        imgWidth = img.width;
        imgHeight = img.height;

        if ( imgWidth && imgHeight ) {
        imgStyle.left = posXIsPercent ? floorTowardsZero( ( innerWidth - imgWidth ) * posX ) + px : posX;
        imgStyle.top = posYIsPercent ? floorTowardsZero( ( innerHeight - imgHeight ) * posY ) + px : posY;

        display = "block";
        }
    }
    }

    imgStyle.display = display;

    expando.current = snapshot;

    // img onload may be called synchronously, leading to us trying to
    // fire onbackgroundupdate within init(), causing an error
    // so wrap it with setTimeout()
    updateEventId = window.setTimeout( function() {
        updateBackgroundCallbackId = window.setTimeout( callback, 0 );

        // if any properties are changed here, processSnapshot() will process them later
        // if ondetach is triggered, updateBackgroundCallbackId will be cleared
        updateEvent.fire();
        }, 0 );
    }

    function floorTowardsZero( value ) {
        var isNegative = value < 0;
        value = Math.floor( Math.abs( value ) );
        return isNegative ? -value : value;
        }

    // handle different style changes
    function handlePropertychange() {
        var expando = element.bgsExpando,
        propertyName = ( window.event || {} ).propertyName,
    backgroundImageProperty = "style.backgroundImage";

    if ( expando.ignore ) {
        expando.ignore = false;
        if ( propertyName === backgroundImageProperty ) {
        return;
        }
    }

    // if the changed property is style.backgroundImage
    // and its value is set to a non-empty string,
    // then the propertychange event will be fired twice
    // http://blog.csdn.net/hax/article/details/1346542
    if ( propertyName === backgroundImageProperty && element.style.backgroundImage ) {
        expando.ignore = true;
        }

    if ( refreshDisplay( element, expando ) ) {
        // since each snapshot includes changes all previous snapshots,
        // we can replace the old next snapshot with a new one
        expando.next = takeSnapshot( element, expando );
        processSnapshot( element, expando );
        }
    }

    function handleResize() {
        window.clearTimeout( resizeId );
        resizeId = window.setTimeout( handlePropertychange, resizeInterval );
        }

    function restore() {
        var expando = element.bgsExpando,
        loadImg,
        elementStyle,
        expandoRestore;

        o = {
        init: noop,
        handlePropertychange: noop,
        restore: noop,
        handleResize: noop
        };

    window.clearTimeout( resizeId );
    window.clearTimeout( processSnapshotId );
    window.clearTimeout( updateEventId );
    window.clearTimeout( updateBackgroundCallbackId );

    try {
        if ( expando ) {
        loadImg = expando.loadImg;
        if ( loadImg ) {
        loadImg.onload = loadImg.onerror = null;
        window.clearTimeout( loadImg.callbackId );
        }

    elementStyle = element.style;
    expandoRestore = expando.restore;
    if ( elementStyle ) {
        elementStyle.backgroundImage = expandoRestore.backgroundImage;
        elementStyle.position = expandoRestore.position;
        elementStyle.zIndex = expandoRestore.zIndex;
        }

    element.removeChild( expando.wrapper );
    }

    element.bgsExpando = null;

    } catch ( e ) {}

    element = window = doc = noop = null;
    }

    // don't allow anything until init() is called
    // IE seems to think it needs to attach the behavior a second time for printing
    o = {
        init: doc.media !== "print" ? init : noop,
        handlePropertychange: noop,
        restore: noop,
        handleResize: noop
        };

    if ( element.readyState === "complete" ) {
        o.init();
        }

    })( element, window );

    </script>

    <!--
    Work around IE sillyness, see:
    http://www.pcreview.co.uk/forums/htc-components-512-bytes-javascript-slow-unload-t727396.html
    https://github.com/lojjic/PIE/blob/master/sources/htc_markup.htc
    https://code.google.com/p/svgweb/source/browse/trunk/src/svg.htc
    -->
    <script type="text/vbscript"></script>
</PUBLIC:COMPONENT>