var grayIcon;
function getGrayIcon() {
	if (!grayIcon) {
		grayIcon = new GIcon(G_DEFAULT_ICON, "/map/marker-gray.png");
	}
	return grayIcon;
}

var yellowIcon;
function getYellowIcon() {
	if (!yellowIcon) {
		yellowIcon = new GIcon(G_DEFAULT_ICON, "/map/marker-yellow.png");
	}
	return yellowIcon;
}