function openWindow(url,width,height) {
	var features;
	w = width;
	h = height;
	l = (screen.availWidth - w)/2;
	t = (screen.availHeight - h)/2;
	features  = "toolbar=no";      
	features += ",location=no"; 
	features += ",directories=no";
	features += ",status=no";
	features += ",menubar=no"; 
	features += ",scrollbars=yes"; 
	features += ",resizable=no";
	features += ",dependent";
	features += ",height=" + h;
	features += ",width=" + w;
	features += ",left=" + l;
	features += ",top=" + t;
	window.open(url,'',features);
}