var origSrc = "";
   
function doHover(what)
{
    var imgs = what.getElementsByTagName("img");
    var links = what.getElementsByTagName("div");
    
    for(var i=0; i<imgs.length; i++)
    {
        var img = imgs[i];
    
        if (img.className == "linkImage") {
            origSrc = img.src;
            img.src = img.src.replace("off.gif", "hover.gif");
            img.src = img.src.replace("on.gif", "hover.gif");
        }
    }
    
    for (var i=0; i<links.length; i++)
        if (links[0].className == "subLinks")
            links[0].style.display = "block";
}

function doUnHover(what)
{
    var imgs = what.getElementsByTagName("img");
    var links = what.getElementsByTagName("div");
    
    for(var i=0; i<imgs.length; i++)
    {
        var img = imgs[i];
    
        if (img.className == "linkImage") {
            img.src = origSrc;
            origSrc = "";
        }
    }
    
    for (var i=0; i<links.length; i++)
        if (links[0].className == "subLinks")
            links[0].style.display = "none";
}