Pop-Up Window In Need Of Delay?

I am trying to create a pop-up window that will remain in front of the
orignal webpage. The pop-up is called as follows:

<script type="text/javascript">
var newWin=null

var winl = (screen.width-208)/2;
var wint = (screen.height-228)/2;

newWin=window.open("URL",'mywindow','left=' + winl + ',top=' +
wint+
',width=208,height=228,toolbar=,menubar=,location= ,scroll=,resizable=,status=');

newWin=window.focus(mywindow);
</script>

The webpage that this pop-up is called from is a completely blank page
that calls another website via a frame:

<frameset rows="100%,*">
<frame src="URL" >
<frame src="Untitled">
</frameset>
<noframes>
</noframes>

The reasoning behind this is because I am unable to modify the page
that the frame is calling and a pop-up needed to be loaded in front of
it. The problem is, when this page is run the pop-up comes into focus,
but when the frame called URL is finished loading, the pop-up is pushed
to the back. I cannot seem to find a way to make it focus and I think
that delaying the pop-up from lauching would solve this problem but I
have been unable to properly implement it.