if (document.images) {
    learn_about_on= new Image(197,57);
    learn_about_on.src="../../images/home/ecbanns/learn_about_hover.jpg";
    view_all_on = new Image(197,57);
    view_all_on.src="../../images/home/ecbanns/view_all_hover.jpg"; 

    learn_about_off= new Image(197,57);
    learn_about_off.src="../../images/home/ecbanns/learn_about.jpg";
    view_all_off= new Image(197,57);
    view_all_off.src="../../images/home/ecbanns/view_all.jpg";
}

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

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