if (document.images) {
        menubuttonm1up = new Image();
        menubuttonm1up.src = "images/menu_e.gif";
        menubuttonm1down = new Image();
        menubuttonm1down.src = "images/menu_e.gif";

   	menubuttonup = new Image();
        menubuttonup.src = "images/menu.gif";
        menubuttondown = new Image();
        menubuttondown.src = "images/menu_e.gif";
        
        takeoutbuttonup = new Image();
        takeoutbuttonup.src = "images/togo.gif";
        takeoutbuttondown = new Image();
        takeoutbuttondown.src = "images/togo_e.gif";

  	takeoutbuttonm1up = new Image();
        takeoutbuttonm1up.src = "images/togo_e.gif";
        takeoutbuttonm1down = new Image();
        takeoutbuttonm1down.src = "images/togo_e.gif";

        locationsbuttonup = new Image();
        locationsbuttonup.src = "images/locations.gif";
        locationsbuttondown = new Image();
        locationsbuttondown.src = "images/locations_e.gif";
 
        locationsbuttonm1up = new Image();
        locationsbuttonm1up.src = "images/locations_e.gif";
        locationsbuttonm1down = new Image();
        locationsbuttonm1down.src = "images/locations_e.gif";

        contactbuttonup = new Image();
        contactbuttonup.src = "images/contact.gif";
        contactbuttondown = new Image();
        contactbuttondown.src = "images/contact_e.gif";

     	contactbuttonm1up = new Image();
        contactbuttonm1up.src = "images/contact_e.gif";
        contactbuttonm1down = new Image();
        contactbuttonm1down.src = "images/contact_e.gif";

        aboutbuttonup = new Image();
        aboutbuttonup.src = "images/about.gif";
        aboutbuttondown = new Image();
        aboutbuttondown.src = "images/about_e.gif";

        aboutbuttonm1up = new Image();
        aboutbuttonm1up.src = "images/about_e.gif";
        aboutbuttonm1down = new Image();
        aboutbuttonm1down.src = "images/about_e.gif";

    }
    function buttondown(buttonname) {
        if (document.images) {
            document[buttonname].src = eval(buttonname + "down.src");
        }
    }
    function buttonup(buttonname) {
        if (document.images) {
            document[buttonname].src = eval(buttonname + "up.src");
        }
    }