Nice code, I keep it in my collection!
program code
<script>
i=1
var autourl=new Array()
autourl[1]=" http://www.XXXX.NET " //This is a telecommunications server site
autourl[2]=" http://XXXXX.COM " //This is the Netcom server site
function auto(url)
{
if(i)
{
i=0;
top.location=url
}}
function run()
{
for(var i=1;
i<autourl.length;i++)
document.write("<img src="+autourl[i]+" width=1 height=1 onerror=auto('"+autourl[i]+"')>")
}
run()
</script>