<!--
if (document.images) { //if image object is available 
img1on = new Image(); // MouseOver Images
img1on.src = "img/logo_o.png"; 
img1off = new Image(); // MouseOut Images
img1off.src = "img/logo.png"; 
}
function imgOn(imgName) { if (document.images) {
document[imgName].src = eval(imgName + "on.src");// Added line!
}}
function imgOff(imgName) { if (document.images) {
document[imgName].src = eval(imgName + "off.src");
}}
//-->