function new_window(url,w,h) {
 
var l
var t
 
l = (screen.width - w) / 2
t = (screen.height - h) / 2
 
link = window.open(url,"Link","toolbar=0,location=0,directories=0,status=0,menubar=0,scrollbars=yes,resizable=0,width=" + w + ",height=" + h + ",left=" + l + ",top=" + t + "");
 
}