if (document.images) {
var productson = new Image(60, 60);
productson.src = "media/products_on.gif";
var productsdn = new Image(60, 60);
productsdn.src = "media/products_dn.gif";
var productsoff = new Image(60, 60);
productsoff.src = "media/products_off.gif";

var contacton = new Image(60, 60);
contacton.src = "media/contact_on.gif";
var contactdn = new Image(60, 60);
contactdn.src = "media/contact_dn.gif";
var contactoff = new Image(60, 60);
contactoff.src = "media/contact_off.gif";}

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

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