function openWindow(filename, w, h, winname)
{   
	var nWidth;
	var nHeigth;

	if (h) nHeigth = h; else nHeigth = 500;
	if (w) nWidth = w; else nWidth = 700;
	if (!winname) winname = "_blank"; 	
	var desktop = window.open(filename, winname, 
    "width="+nWidth+",height="+nHeigth+",toolbar=no,location=no,status=no,menubar=no,scrollbars=yes,resizable=yes");
}