var pngFix = {
   addLoadEvent : function (fn) {  
      var old = window.onload;
      if (typeof window.onload != 'function') {
         window.onload = fn;
      }
      else {
         window.onload = function() {
         old();
         fn();
         }
      }
   },
   corregirImagenes:function () // correctly handle PNG transparency in Win IE 5.5 & 6.
{
   var arVersion = navigator.appVersion.split("MSIE")
   var version = parseFloat(arVersion[1])
   if ((version >= 5.5 && version < 7) && (document.body.filters)) 
   {
      for(var i=0; i<document.images.length; i++)
      {
         var img = document.images[i]
         var imgName = img.src.toUpperCase()
         if (imgName.substring(imgName.length-3, imgName.length) == "PNG")
         {
            var imgID = (img.id) ? "id='" + img.id + "' " : ""
            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
            var strNewHTML = "<span " + imgID + imgClass + imgTitle
            + " style=\"" + "width:" + img.width + "px; height:" + img.height + "px;" + imgStyle + ";"
            + "filter:progid:DXImageTransform.Microsoft.AlphaImageLoader"
            + "(src=\'" + img.src + "\', sizingMethod='scale');\"></span>" 
            img.outerHTML = strNewHTML
            i = i-1
         }
      }
   }    
},

  corregirFondos : function(){
      var rslt = navigator.appVersion.match(/MSIE (\d+\.\d+)/, '');
      var itsAllGood = (rslt != null && Number(rslt[1]) >= 5.5);
      if (itsAllGood){
         for (i=0; i<document.all.length; i++){
            var bg = document.all[i].currentStyle.backgroundImage;
            if (bg){
               if (bg.match(/\.png/i) != null){
                  var mypng = bg.substring(5,bg.length-2);
                  document.all[i].style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+mypng+"', sizingMethod='scale')";
                  document.all[i].style.backgroundImage = "url('')"; //doesnt exist ?
               }
            }
         }
      }
   },
	reparar : function() {
		this.corregirImagenes();   
		this.corregirFondos();
	}
}
//window.addEvent("domready",function(){
									
//									});
pngFix.addLoadEvent(function(){pngFix.reparar();})