function correctPNG()
{
   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;
         if (imgName.substring(imgName.length-3, imgName.length) == "png")
         {
		 	img.src = imgName.substring(0,  imgName.length - 3) + "gif";
         }
      }
   }    
}