if (document.images)
{
        var LOGO__     = new Image();
            LOGO__.src = "logo.gif";

        var LOGO_R     = new Image();
            LOGO_R.src = "logo-R.gif";
        var LOGO_E     = new Image();
            LOGO_E.src = "logo-E.gif";
        var LOGO_T     = new Image();
            LOGO_T.src = "logo-T.gif";
        var LOGO_A     = new Image();
            LOGO_A.src = "logo-A.gif";
        var LOGO_S     = new Image();
            LOGO_S.src = "logo-S.gif";

        var FOOT__     = new Image();
            FOOT__.src = "footer.gif";
        var FOOT_R     = new Image();
            FOOT_R.src = "footer-R.gif";
        var FOOT_E     = new Image();
            FOOT_E.src = "footer-E.gif";
        var FOOT_T     = new Image();
            FOOT_T.src = "footer-T.gif";
        var FOOT_A     = new Image();
            FOOT_A.src = "footer-A.gif";
        var FOOT_S     = new Image();
            FOOT_S.src = "footer-S.gif";
}

// switch images

function swim(Name) {
        if (document.images)
        {
            var sObj = eval("LOGO_" + Name + ".src");
            if (document.images["LOGO__"])
                document.images["LOGO__"].src = sObj;

            if (Name != "Y" && Name != "H")
            {
                sObj = eval("FOOT_" + Name + ".src");
                if (document.images["FOOT__"])
                    document.images["FOOT__"].src = sObj;
            }
        }
}