[下面是另外的一个文档，也就是被调用的资料。]

iepngfix.htc：

<public:component>
<public:attach event="onpropertychange" onevent="doFix()" />

<script type="text/javascript">

// IE5.5+ PNG Alpha Fix v1.0RC4
// (c) 2004-2005 Angus Turnbull http://www.twinhelix.com

// This is licensed under the CC-GNU LGPL, version 2.1 or later.
// For details, see: http://creativecommons.org/licenses/LGPL/2.1/

// This must be a path to a blank image. That's all the configuration you need.
if (typeof blankImg == 'undefined') var blankImg = 'blank.gif';

var f = 'DXImageTransform.Microsoft.AlphaImageLoader';

function filt(s, m)
{
if (filters[f])
{
    filters[f].enabled = s ? true : false;
    if (s) with (filters[f]) { src = s; sizingMethod = m }
}
else if (s) style.filter = 'progid:'+f+'(src="'+s+'",sizingMethod="'+m+'")';
}

function doFix()
{
// Assume IE7 is OK.
if (!/MSIE (5\.5|6\.)/.test(navigator.userAgent) ||
    (event && !/(background|src)/.test(event.propertyName))) return;

var bgImg = currentStyle.backgroundImage || style.backgroundImage;

if (tagName == 'IMG')
{
    if ((/\.png$/i).test(src))
    {
     if (currentStyle.width == 'auto' && currentStyle.height == 'auto')
        style.width = offsetWidth + 'px';
     filt(src, 'scale');
     src = blankImg;
    }
    else if (src.indexOf(blankImg) < 0) filt();
}
else if (bgImg && bgImg != 'none')
{
    if (bgImg.match(/^url[("']+(.*\.png)[)"']+$/i))
    {
     var s = RegExp.$1;
     if (currentStyle.width == 'auto' && currentStyle.height == 'auto')
        style.width = offsetWidth + 'px';
     style.backgroundImage = 'none';
     filt(s, 'crop');
     // IE link fix.
     for (var n = 0; n < childNodes.length; n++)
        if (childNodes[n].style) childNodes[n].style.position = 'relative';
    }
    else filt();
}
}

doFix();

</script>
</public:component>