s="";
	n=document.images.length;
	for (i=0;i<n;i++){
		src=document.images[i].src;
		if (s.indexOf(";"+src)==-1)	s=s+";"+src;
	}
	var images_src=s.split(";");
	var images=new Array();
	n=images_src.length;
	for (i=0;i<n;i++){
		images=new Image();
		images.src=images_src[i];
	}