// Centered Pop-Up Window
var newWin;

function centeredWindow(url,winname,s,w,h) {
	windowleft = (screen.width - w)/2;
	windowtop = (screen.height - h)/2;
	settings = '"toolbar=no,directories=no,menubar=no,scrollbars='+s+',resizable=no,status=no,width='+w+',height='+h+',left='+windowleft+',top='+windowtop+'"';
	closeWindow();
	newWin = window.open(url,winname,settings);
	newWin.focus();
}

function closeWindow() {
	if (newWin && !newWin.closed) {
			newWin.close();
	}
}