function clickpop() {
var urlpopup = "http://www.exhibweb.com/sites_exhib.php?link=popnologin";
var wid=(screen.width-10);  
var hei=(screen.height-32); 
window.open(''+urlpopup+'','popup1','toolbar=0,location=0,directories=0,status=0,scrollbars=1,resizable=1,copyhistory=0,menuBar=0,width='+wid+',height='+hei+'');
}