function enablePngImages() 
      { var imgArr = document.getElementsByTagName("IMG"); 
        for(i=0; i<imgArr.length; i++){    
        if(imgArr[i].src.toLowerCase().lastIndexOf(".png") != -1)
        {     
          imgArr[i].style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='" + imgArr[i].src + "', sizingMethod='auto')";     
          imgArr[i].src = "spacer.gif";    
        }       
          if(imgArr[i].currentStyle.backgroundImage.lastIndexOf(".png") != -1)
          {     
            var img = imgArr[i].currentStyle.backgroundImage.substring(5,imgArr[i].currentStyle.backgroundImage.length-2);
            imgArr[i].style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+img+"', sizingMethod='crop')";     
            imgArr[i].style.backgroundImage = "url(spacer.gif)";    
          } 
        } 
    } 
      function enableBgPngImages(bgElements)
      { 
      for(i=0; i<bgElements.length; i++)
        {    
        if(bgElements[i].currentStyle.backgroundImage.lastIndexOf(".png") != -1)
        {     //alert(bgElements[i]);     
        var img = bgElements[i].currentStyle.backgroundImage.substring(5,bgElements[i].currentStyle.backgroundImage.length-2);     
        bgElements[i].style.filter = "progid:DXImageTransform.Microsoft.AlphaImageLoader(src='"+img+"', sizingMethod='crop')";     
        bgElements[i].style.backgroundImage = "url(spacer.gif)";    
    } 
      } 
      }