Foros del Web - PNG y CSS para IE

Pon este script en tus paginas:
Código:
<!--[if gte IE 5.5000]>

<script language="JavaScript">

function correctPNG() // correctly handle PNG transparency in Win IE 5.5 or higher.

   {

   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 + "\');\"></span>" 

         img.outerHTML = strNewHTML

         i = i-1

         }

      }

   }

window.attachEvent("onload", correctPNG);

</script>

<![endif]-->