求指导，这一段代码什么意思？？？？？？
function fixPNG(myImage) {
var arVersion = navigator.appVersion.split("MSIE");
var version = parseFloat(arVersion[1]);
if ((version >= 5.5) && (version < 7) && (document.body.filters))
{
var imgID = (myImage.id) ? "id='" + myImage.id + "' " : "";
var imgClass = (myImage.className) ? "class='" + myImage.className + "' " : "";
var imgTitle = (myImage.title) ? "title='" + myImage.title + "' " : "title='" + myImage.alt + "' ";
var imgStyle = "display:inline-block;" + myImage.style.cssText;
var strNewHTML = "<span " + imgID + imgClass + imgTitle + " style=\"" + "width:" + myImage.width + "px; height:" + myImage.height + "px;" + imgStyle + ";" + "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader" + "(src=\'" + myImage.src + "\', sizingMethod='scale');\"></span>";
myImage.outerHTML = strNewHTML;
} }


------解决方案--------------------

探讨

function fixPNG(myImage) {
var arVersion = navigator.appVersion.split("MSIE");
var version = parseFloat(arVersion[1]);
if ((version >= 5.5) &amp;&amp; (version < 7) &amp;&amp; (document.body.filter……

------解决方案--------------------
这是一个浏览器Hack技巧，因为IE6.0不支持透明的png格式图片，所以要判断并处理下。其它浏览器原生支持透明的png图片，就不需要。