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) {
		home_black0 = newImage("graphics/menu/home_black0.gif");
		gallery_black0 = newImage("graphics/menu/gallery_black0.gif");
		links_black0 = newImage("graphics/menu/links_black0.gif");
		contact_black0 = newImage("graphics/menu/contact_black0.gif");
		home_white0 = newImage("graphics/menu/home_white0.gif");
		gallery_white0 = newImage("graphics/menu/gallery_white0.gif");
		links_white0 = newImage("graphics/menu/links_white0.gif");
		contact_white0 = newImage("graphics/menu/contact_white0.gif");
		home_black1 = newImage("graphics/menu/home_white1.gif");
		gallery_black1 = newImage("graphics/menu/gallery_white1.gif");
		links_black1 = newImage("graphics/menu/links_white1.gif");
		contact_black1 = newImage("graphics/menu/contact_white1.gif");
		home_white1 = newImage("graphics/menu/home_white1.gif");
		gallery_white1 = newImage("graphics/menu/gallery_white1.gif");
		links_white1 = newImage("graphics/menu/links_white1.gif");
		contact_white1 = newImage("graphics/menu/contact_white1.gif");
		preloadFlag = true;
	}
}

preloadImages();