// JavaScript Document
<!--[if gte IE 5.5000]>


// Correctly handle PNG transparency in Win IE 5.5 or higher.
//修改内容：改成每个图片onload的时候进行判断是否png，并设置透明

function correctPNG(img) 
    {
     var imgName = img.src
   if (imgName.match(/\.png$/i)){
     var span=null;
     if (img.tid){
      span=document.getElementById(img.tid);
     }
     else{
        span=document.createElement("span");
       span.id="_"+Math.random()*100;
       img.tid=span.id;
       img.parentElement.insertBefore(span,img);
     }
     span.className=img.className?img.className:"";
     span.title=img.alt?img.alt:"";
      var imgClass = (img.className) ? "class='" + img.className + "' " : ""
      var imgTitle = (img.title) ? "title='" + img.title + "' " : "title='" + img.alt + "' "
      var imgStyle = "display:inline-block;" + img.style.cssText 
      if (img.align == "left") imgStyle = "float:left;" + imgStyle
      if (img.align == "right") imgStyle = "float:right;" + imgStyle
      if (img.parentElement.href) imgStyle = "cursor:hand;" + imgStyle   
    span.style.cssText="width:"+img.width+"px;height:"+img.height+"px;"+imgStyle+";"+ "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader"      + "(src=\'" + img.src + "\', sizingMethod='scale');"
    img.style.display="none";
   }
   else{
     if (img.tid){
       document.getElementById(img.tid).style.display="none";
     }
     img.style.display="";
   }
    }
function imgInit(){
   for (var i=0,img;img=document.images[i];i++){
   img.attachEvent("onload",function(){correctPNG(event.srcElement)});
   correctPNG(img);
   }
}
window.attachEvent("onload", imgInit);

<![endif]-->