aboutuson = new Image(56, 24);
aboutuson.src = "images/navbuttons/aboutus_ovr.gif";
contactuson = new Image(65, 24);
contactuson.src = "images/navbuttons/contactus_ovr.gif";
linkson = new Image(34, 24);
linkson.src = "images/navbuttons/links_ovr.gif";

button1on = new Image(120, 24);
button1on.src = "images/navbuttons/home_ovr.gif";
button2on = new Image(120, 24);
button2on.src = "images/navbuttons/downloads_ovr.gif";
button3on = new Image(120, 24);
button3on.src = "images/navbuttons/order_ovr.gif";
button4on = new Image(120, 24);
button4on.src = "images/navbuttons/search_ovr.gif";

button1off = new Image(120, 24);
button1off.src = "images/navbuttons/home_out.gif";
button2off = new Image(120, 24);
button2off.src = "images/navbuttons/downloads_out.gif";
button3off = new Image(120, 24);
button3off.src = "images/navbuttons/order_out.gif";
button4off = new Image(120, 24);
button4off.src = "images/navbuttons/search_out.gif";

aboutusoff = new Image(56, 24);
aboutusoff.src = "images/navbuttons/aboutus_out.gif";
contactusoff = new Image(65, 24);
contactusoff.src = "images/navbuttons/contactus_out.gif";
linksoff = new Image(34, 24);
linksoff.src = "images/navbuttons/links_out.gif";


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

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