javascript function to open new window

hi everyone,

as y'all can see i'm trying to open a new window without any toolbars, and close the old window. How can i get the new window to fill up the whole screen no matter what the user's screen resolution is... what do i have to do?

My code:

<SCRIPT LANGUAGE="JavaScript">
function spawnwindow(name,w,h,x,y) {
var strOpt="height="+h+",width="+w+",menubar=no,personalbar=no,resizable=yes,scrollbars=yes,status=no,toolbar=no,left="+x+",top="+y+"";
closeup = window.open("JOBFRAMES.php","whatever",strOpt);
close();
closeup.focus();
}
</SCRIPT>


etc...
etc...

<a href="Javascript" ONCLICK="spawnwindow('logpass',800,600);">Continue</a>


any help appreciated.

thx.