var g_objImageCache = new Object();
var g_iImageIndex = 0;

// cache images
function CacheImage(sFilename) {
	g_objImageCache[g_iImageIndex] = new Image();
	g_objImageCache[g_iImageIndex].src = sFilename;
	g_iImageIndex++;
}

// cache menu
function CacheMenu() {
	CacheImage("images/menu_homepage_selected.gif");
	CacheImage("images/menu_about_off.gif");
	CacheImage("images/menu_products_off.gif");
	CacheImage("images/menu_news_off.gif");
	CacheImage("images/menu_members_off.gif");
	CacheImage("images/menu_join_off.gif");
	CacheImage("images/menu_links_off.gif");
	CacheImage("images/menu_contact_off.gif");
	CacheImage("images/menu_advert_off.gif");
	
	CacheImage("images/menu_homepage_on.gif");
	CacheImage("images/menu_about_on.gif");
	CacheImage("images/menu_products_on.gif");
	CacheImage("images/menu_news_on.gif");
	CacheImage("images/menu_members_on.gif");
	CacheImage("images/menu_join_on.gif");
	CacheImage("images/menu_links_on.gif");
	CacheImage("images/menu_contact_on.gif");
	CacheImage("images/menu_advert_on.gif");	
}