function popup(loc,winsizew,winsizeh)
{var top = (screen.height / 2) - (winsizeh /2);
 var left = ((screen.width / 2) - (winsizew / 2))/2;
 picture=window.open(loc,"win","toolbar=no,location=no,status=no,directories=no,menubar=no,scrollbars=no,resizable=no,width="+winsizew+",height="+winsizeh+",top="+top+",left="+left);
 setTimeout ('picture.focus()','1000');}