function enlarge(url) {
X=screen.availWidth/2-100; Y=screen.availHeight/2-100;
 window.open('includes/popup.php?url='+url,'popupWindow','toolbar=no,location=no,status=no,menubar=no,scrollbars=no,resizable=yes,width=200,height=200,screenX='+X+',screenY='+Y+',top='+Y+',left='+X)
}