if (document.images) {

            img1on = new Image();
            img1on.src = "images/nav/homeOn.gif";
	    img2on = new Image();
            img2on.src = "images/nav/jymmarksOn.gif";
            img3on = new Image();
            img3on.src = "images/nav/quartetOn.gif";
            img4on = new Image();
            img4on.src = "images/nav/salonOn.gif";
            img5on = new Image();
            img5on.src = "images/nav/contactOn.gif";  
           
            img1off = new Image();
            img1off.src = "images/nav/homeOff.gif";
            img2off = new Image();
            img2off.src = "images/nav/jymmarksOff.gif";
            img3off = new Image();
            img3off.src = "images/nav/quartetOff.gif";
            img4off = new Image();
            img4off.src = "images/nav/salonOff.gif";
            img5off = new Image();
            img5off.src = "images/nav/contactOff.gif";  

      
        }

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");
        }
}