var openedWindows = new Array();

function openWindow(name, url, width, height, scrolls) {
	var w = width ? width : 400;
	var h = height ? height : 250;
	var x = (screen.width - w) / 2;
	var y = (screen.height - h) / 2;
	openedWindows[name] = window.open(url, name, "width=" + w + ", height=" + h + ", top=" + y + ", left=" + x + ", directories=no, resizable=no, menubar=no, status=no, titlebar=no, toolbar=no" + (scrolls ? ", scrollbars=" + scrolls : ""));
	openedWindows[name].focus();
}