Closing New Window

I'm using a javascript to create a new window. The code I'm using is this:
<SCRIPT LANGUAGE="JavaScript">
<!-- Begin
function NewWindow(mypage, myname, w, h, scroll) {
var winl = (screen.width - w) / 2;
var wint = (screen.height - h) / 2;
winprops = 'height='+h+',width='+w+',top='+wint+',left='+winl +',scrollbars='+scroll+',resizable'
win = window.open(mypage, myname, winprops)
if (parseInt(navigator.appVersion) >= 4) { win.window.focus(); }
}
// End -->

</script>

Then to actually do the window I'm using this code:
onclick="NewWindow(this.href,'name','500','500','yes');retu rn false;">

Now in the php part, how would I automaticly make the window close without the enduser clicking on something?

Thank you for your time in this matter.

Thread moved from 'PHP Coding' to 'Client Side Things' by Matt.

Reason: it wouldn't be php...need to use javascript to do that.