if (document.images) {
            aaon = new Image();     aaon.src = "./_IMG/Demo1.gif";
            aaoff = new Image();    aaoff.src = "./_IMG/Demo.gif";
            abon = new Image();     abon.src = "./_IMG/Contact1.gif";
            aboff = new Image();    aboff.src = "./_IMG/contact.gif";
            acon = new Image();     acon.src = "./_IMG/FAQ1.gif";
            acoff = new Image();    acoff.src = "./_IMG/FAQ.gif";
            adon = new Image();     adon.src = "./_IMG/Legal1.gif";
            adoff = new Image();    adoff.src = "./_IMG/Legal.gif";
           // aeon = new Image();     aeon.src = "pers2.jpg";
           // aeoff = new Image();    aeoff.src = "pers.jpg";
           // afon = new Image();     afon.src = "html2.jpg";
           // afoff = new Image();    afoff.src = "html.jpg";
           // agon = new Image();     agon.src = "flor2.jpg";
           // agoff = new Image();    agoff.src = "flor.jpg";
         }

     function imgOn(imgName) {
            if (document.images) {
                document[imgName].src = eval(imgName + "on.src");
            }
    }
        
        function imgOff(imgName) {
            if (document.images) {
                document[imgName].src = eval(imgName + "off.src");
            }
    }