function rollOver(button){
    var pageID = document.getElementById("hfPageID");
    var obj = document.getElementById(button);
    if("nav_" + pageID.value == button){
    }else{
        obj.src = "/images/buttons/" + button + "-ro.jpg";
    }
}

function rollOff(button){
    var pageID =document.getElementById("hfPageID");
    var obj = document.getElementById(button);
    if("nav_" + pageID.value == button){
    }else{
        obj.src = "/images/buttons/" + button + "-idle.jpg";
    }
}