function open_window(link,w,h) 
{
var 
win = "toolbar=0, location=0, directories=0, status=0, menubar=0, scrollbars=0, resizable=0, copyhistory=0, Width=" + w + ",Height=" + h + ",Left=" + Math.ceil( (document.body.clientWidth/2) - (w/2)) + ",Top=" + Math.ceil((document.body.clientHeight/2) - (h/2));
newWin = window.open(link,'newWin',win);
newWin.focus();
}