if (document.images) {

image1on = new Image();
image1on.src = "../img_sito/menu/negozio1.gif";
image1off = new Image();
image1off.src = "../img_sito/menu/negozio.gif";

image2on = new Image();
image2on.src = "../img_sito/menu/servizi1.gif";
image2off = new Image();
image2off.src = "../img_sito/menu/servizi.gif";

image3on = new Image();
image3on.src = "../img_sito/menu/prodotti1.gif";
image3off = new Image();
image3off.src = "../img_sito/menu/prodotti.gif";

image4on = new Image();
image4on.src = "../img_sito/menu/eventi1.gif";
image4off = new Image();
image4off.src = "../img_sito/menu/eventi.gif";

image5on = new Image();
image5on.src = "../img_sito/menu/blog1.gif";
image5off = new Image();
image5off.src = "../img_sito/menu/blog.gif";

image6on = new Image();
image6on.src = "../img_sito/menu_prodotti/bici1.png";
image6off = new Image();
image6off.src = "../img_sito/menu_prodotti/bici.png";

image7on = new Image();
image7on.src = "../img_sito/menu_prodotti/pattini1.png";
image7off = new Image();
image7off.src = "../img_sito/menu_prodotti/pattini.png";

image8on = new Image();
image8on.src = "../img_sito/menu_prodotti/skate1.png";
image8off = new Image();
image8off.src = "../img_sito/menu_prodotti/skate.png";

image9on = new Image();
image9on.src = "../img_sito/menu_prodotti/accessori1.png";
image9off = new Image();
image9off.src = "../img_sito/menu_prodotti/accessori.png";

image10on = new Image();
image10on.src = "../img_sito/menu/store1.gif";
image10off = new Image();
image10off.src = "../img_sito/menu/store.gif";
}
function turnOn(imageName) {
if (document.images) {
 document[imageName].src = eval(imageName + "on.src");
     }
}
function turnOff(imageName) {


  if (document.images) {


    document[imageName].src = eval(imageName + "off.src");
 }
}