// Active Images
if (document.images) 
{ 
   homeon = new Image();
   homeon.src = "../images/home2.gif";

   homeoff = new Image();
   homeoff.src = "../images/home.gif";

   autoon = new Image();
   autoon.src =  "../images/auto2.gif";

   autooff = new Image();
   autooff.src =  "../images/auto.gif";

   businesson = new Image();
   businesson.src = "../images/business2.gif";

   businessoff = new Image();
   businessoff.src = "../images/business.gif";

   lifeon = new Image();
   lifeon.src = "../images/life2.gif";

   lifeoff = new Image();
   lifeoff.src = "../images/life.gif";
   
}

// Function to 'activate' images.
function imgOn(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "on.src");
        }
}

// Function to 'deactivate' images.
function imgOff(imgName) {
        if (document.images) {
            document[imgName].src = eval(imgName + "off.src");
        }
}