function newImage(arg) {
	if (document.images) {
		rslt = new Image();
		rslt.src = arg;
		return rslt;
	}
}

function changeImages() {
	if (document.images && (preloadFlag == true)) {
		for (var i=0; i<changeImages.arguments.length; i+=2) {
			document[changeImages.arguments[i]].src = changeImages.arguments[i+1];
		}
	}
}

var preloadFlag = false;
function preloadImages() {
	if (document.images) {
		gbmenu_nav3 = newImage("../images/nav3on.jpg");
		gbmenu_nav4 = newImage("../images/nav4on.jpg");
		gbmenu_nav5 = newImage("../images/nav5on.jpg");
		gbmenu_navx5 = newImage("../images/navx5on.jpg");
		gbmenu_nav7 = newImage("../images/nav7on.jpg");
		gbmenu_nav8 = newImage("../images/nav8on.jpg");
		gbmenu_nav9 = newImage("../images/nav9on.jpg");
		gbmenu_nav12 = newImage("../images/nav12on.jpg");
		gbmenu_nav11 = newImage("../images/nav11on.jpg");
		gbmenu_nav10 = newImage("../images/nav10on.jpg");
		preloadFlag = true;
	}
}