var scrW;
var scrH;
scrW = screen.width / 2;
scrH = screen.height / 2;
function LegendWin(URLVar,nameVar,winW,winH) {
	window.open(URLVar, nameVar,
		'width=' + winW + ',height=' + winH +
		',top=' + (scrH-(winH/2)) + ',left=' + (scrW-(winW/2)) +
		',toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=auto,resizable=no');
}