if (document.images) {                                           
            img2on = new Image();
            img2on.src = "images/on-02.gif";
            img3on = new Image();
            img3on.src = "images/on-03.gif";
            img4on = new Image();
            img4on.src = "images/on-04.gif";
            img5on = new Image();
            img5on.src = "images/on-05.gif";
            img6on = new Image();
            img6on.src = "images/on-06.gif";
            img7on = new Image();
            img7on.src = "images/on-07.gif"; 
            img8on = new Image();
            img8on.src = "images/on-08.gif";
            img9on = new Image();
            img9on.src = "images/on-news.gif";
            img10on = new Image();
            img10on.src = "images/on-books.gif";
			img11on = new Image();
            img11on.src = "images/on-email.gif";


            img2off = new Image();                                                             
            img2off.src = "images/off-02.gif";
            img3off = new Image();
            img3off.src = "images/off-03.gif";
            img4off = new Image();
            img4off.src = "images/off-04.gif";
            img5off = new Image();
            img5off.src = "images/off-05.gif";
            img6off = new Image();
            img6off.src = "images/off-06.gif";
            img7off = new Image();
            img7off.src = "images/off-07.gif";                   
            img8off = new Image();
            img8off.src = "images/off-08.gif";                  
            img9off = new Image();
            img9off.src = "images/off-news.gif";
            img10off = new Image();
            img10off.src = "images/off-books.gif";
			img11off = new Image();
            img11off.src = "images/off-email.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");
        }
}