var spacerGif = "menu_images/x.gif";                     // path to a transparent spacer gif
        var dingbatOn = "menu_images/submenu-on.gif";            // path to the active sub menu dingbat
        var dingbatOff = "menu_images/submenu-off.gif";          // path to the inactive sub menu dingbat
        var shadowPng = "menu_images/grey-40.png";               // a PNG graphic to serve as the shadow for mac IE5        
        var backgroundPng = "menu_images/grey-40.png";          // a PNG graphic to server as the background for mac IE5