homeon = new Image();                    
homeon.src = "images/home_on.gif";
homeoff = new Image();
homeoff.src = "images/home_off.gif";

productson = new Image();                    
productson.src = "images/products_on.gif";
productsoff = new Image();
productsoff.src = "images/products_off.gif";

newson = new Image();                    
newson.src = "images/news_on.gif";
newsoff = new Image();
newsoff.src = "images/news_off.gif";

peopleon = new Image();                    
peopleon.src = "images/people_on.gif";
peopleoff = new Image();
peopleoff.src = "images/people_off.gif";

contacton = new Image();                    
contacton.src = "images/contact_on.gif";
contactoff = new Image();
contactoff.src = "images/contact_off.gif";

// On function
function imgAct(imgName) {
    document[imgName].src = eval(imgName + "on.src");
}

// Off function
function imgInact(imgName) {
    document[imgName].src = eval(imgName + "off.src");
}

function jumpTo(optionObj) {
    window.location.href = optionObj.options[optionObj.selectedIndex].value;
}