function openWindow(filename, w, h)
{
    var nWidth;
	var nHeigth;
	
	if (h) nHeigth = h; else nHeigth = 550;
	if (w) nWidth = w; else nWidth = 700;
	
	var desktop = window.open(filename, "_blank", 
    "width="+nWidth+",height="+nHeigth+",toolbar=no,location=no,status=no, menubar=no,scrollbars=yes,resizable=yes");
}