Script to close pages automatically

Hello everyone,

I'm wodering if any of you have a code I'm looking for or where I can get it. I need a script that closes links that exit from my website after a certain time. For example if you clicked on a text ad on my website and it opens in a new window, I want to make it close by itself after a few minutes. How can I do this?

Any input would be appreciated.

In the popup

<script type="text/javascript" >
<!--
window.setTimeout("window.close()",5000)
//-->
</script>