function Wopen(U){
	var WO1;
	X = (screen.width  - 500) / 2;
	Y = (screen.height - 400) / 2;
	WO1=window.open(U,'download','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=auto,resizable=no,width=500,height=400,left='+X+','+'top='+Y);
	WO1.focus();
	}