function centered(whatPrize, windowSize) 
	{
	var sw = 640, sh = 480;
	sw = screen.availWidth; sh = screen.availHeight;
	
	var popW = 470, popH = 300;
	
	var windowName="centered";
	var otherFeatures = ",menubar=0,scrollbars=1,resizable=0,status=0,directories=0,location=0,toolbar=0";
	if (windowSize=="2") {var otherFeatures = ",menubar=0,scrollbars=0,resizable=0,status=0,directories=0,location=0,toolbar=0";}
	if (windowSize=="1")
		{
		popW = 700;
		popH = 460;
		otherFeatures = ",menubar=1,scrollbars=1,resizable=1,status=1,directories=1,location=1,toolbar=1";
		windowName="pop";
		}
	var topPos = ((sh-popH)/2)-80, leftPos = ((sw-popW)/2-15);
	window.open( (whatPrize),(windowName),"width="+popW+",height="+popH+",top="+topPos+",left="+leftPos+",scrollbars"+otherFeatures);
	}

function openParent(url)
	{ window.opener.location = url; window.close(); }