Javascript and phpinclude Template?

[colicab-d]

Hi all Im working on a small customhack for my site and so far have the follwing code so that a user hits an optimize link with the url "?styleid=$userstyle"

Anyways ive been at this all day sadly with no ftp access and am now trying to get my variable $mystyle back out in the navbar template so I can apply it works with the above stated style link

Ive added this to my php_include_start template

<script language="Javascript">

if ((screen.width>=1024) && (screen.height>=768))
{
<?
 $userstyle ="22";
?>
}
else
{
<?
 $userstyle ="21";
?>
}

</script>

Im getting nothing and the link shows as "?styleid= " anyhelp would be great as im quite new to using js in vbull