imghomeon = new Image();
imghomeon.src = "images/front2b_on.gif";
imghomeoff = new Image();
imghomeoff.src = "images/front2b_off.gif";

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

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