if ((screen.width>=1024) && (screen.height>=801)) {
$("link[rel=stylesheet]:not(:first)").attr({href : "http://www.pubaid.net/_designs/pubaid/main.css"});
}
else  {
$("link[rel=stylesheet]:not(:first)").attr({href : "http://www.pubaid.net/_designs/pubaid/800.css"});
}