function open_window(link,w,h)
{
	var wleft = (screen.width - w) / 2;
	var wtop  = (screen.height - h) / 2;
	var win   = "width="+w+",height="+h+",menubar=no,location=no,resizable=yes,scrollbars=yes,left="+wleft+",top="+wtop;
	newWin    = window.open(link,'newWin',win);
	newWin.focus();
}