if (document.images) {
    
    //ACTIVE IMAGES
    img1on = new Image();                   
    img1on.src = "images/butHomeSel.gif";
    img2on = new Image();                   
    img2on.src = "images/butAboutSel.gif";
    img3on = new Image();                   
    img3on.src = "images/butEventsSel.gif";
    img4on = new Image();                   
    img4on.src = "images/butContactSel.gif";
    img5on = new Image();                   
    img5on.src = "images/butFeedbackSel.gif";
    img6on = new Image();                   
    img6on.src = "images/butLinksSel.gif";

    
    //INACTIVE IMAGES
    img1off = new Image();                  
    img1off.src = "images/butHomeUnsel.gif";
    img2off = new Image();                  
    img2off.src = "images/butAboutUnsel.gif";
    img3off = new Image();                  
    img3off.src = "images/butEventsUnsel.gif";
    img4off = new Image();                  
    img4off.src = "images/butContactUnsel.gif";
    img5off = new Image();                  
    img5off.src = "images/butFeedbackUnsel.gif";
    img6off = new Image();                  
    img6off.src = "images/butLinksUnsel.gif";
    }
    
    function imgOn(imgID) {               
        if (document.images) {
            document.getElementById(imgID).src = eval(imgID + "on.src");
        }
    }
    
    function imgOff(imgID) {
        if (document.images) {
            document.getElementById(imgID).src=eval(imgID + "off.src");
        }
    }