var doc_root = "";

function nav_image_on(obj)
{
   // alert(id);
    obj.src = doc_root + "/images/Layout/nav_images/" + obj.id + "_on.gif";
}


function nav_image_off(obj)
{
     obj.src = doc_root + "/images/Layout/nav_images/" + obj.id + "_off.gif";
}

function highlight_download(obj)
{
    obj.src = doc_root + "/images/Layout/download_showreel_on.gif";
}

function lowlight_download(obj)
{
    obj.src = doc_root + "/images/Layout/download_showreel_on.gif";
}