var popWin = null;
function popup(URL, width, height) {
	if (popWin != null && !popWin.closed)
	   popWin.close();
	var strOptions = "";
	strOptions = "width=" + width + ",height=" + height + ",scrollbars=no,resizable=yes";
	popWin = window.open(URL, 'popWin', strOptions);
	popWin.focus();
}