function openWin(target,wid,hei) {
	var scw = screen.width;
	var sch = screen.height;
	wid = wid + 20;
	hei = hei + 25;
	x = ((scw - wid) / 2);
	y = ((sch - hei) / 2);
	val = "width="+wid+",height="+hei+",status=yes,scrollbars=yes,resizable=yes,left="+x+",top="+y;
	window.open("",target,val);
}