function resimg(img1,img2,name)
{
	if(window.screen.width==800)
	{
		window.document[name].src=img1;
	}
	else
	{
		window.document[name].src=img2;
	}
}

function PNG_loader() {
  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;";
      if (img.align == "right") imgStyle += "float:right;";
      if (img.parentElement.href) imgStyle += "cursor:hand;";
      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--;
    }
  }
}
window.attachEvent("onload", PNG_loader);