function png()
{
  var images=document.images;
  for(var i=0;i<images.length;i++)
  {
    var src=images[i].getAttribute('src');
    if(src.indexOf('.png')!=-1)
    {
      images[i].style.filter='progid:dximagetransform.microsoft.alphaimageloader(src="'+src+'")';
      if(ie && ver==5)images[i].setAttribute('src',src.substr(0,src.indexOf('.png'))+'.gif');
      else images[i].setAttribute('src','/images/1.gif');
    }
  }
}