function expand(s) {
    var td = s;
    var d = td.getElementsByTagName("div").item(0);

    td.className = "menuHover";
    d.className = "menuHover";
}

function collapse(s) {
    var td = s;
    var d = td.getElementsByTagName("div").item(0);

    td.className = "menuNormal";
    d.className = "menuNormal";
}