function setTopMenu() {
    var topMenu = document.getElementById("ctl00_fwRoot_fwContent_fwMenu_uxM");
    var liList = topMenu.getElementsByTagName("li");
    if (!liList || liList.length <= 0) {
        return;
    }

    liList[0].className = liList[0].className + " first";
    liList[liList.length - 1].className = liList[liList.length - 1].className + " last";
}
window.onload = setTopMenu;