$aeh = function(ele, evt, handler) {
    if (ele._events == null || ele._events[evt] == null) {
        $addHandler(ele, evt, handler);
    }
}

function pageLoad() {
    var menu = $get('menu').getElementsByTagName('a');
    for (var i = 0; i < menu.length; i++) {
        $aeh(menu[i], 'mouseover', Function.createDelegate(this, menu_over));
        $aeh(menu[i], 'mouseout', Function.createDelegate(this, menu_out));
    }
}

function menu_over(event) {
    var menu = $get('menu').getElementsByTagName('a');
    var th = $get('menu').getElementsByTagName('th');

    for (var i = 0; i < menu.length; i++) {
        if (menu[i].href == event.target.href && i == 0) {
            th[0].className = 'menulefthover';
            break;
        }
        else if (menu[i].href == event.target.href && i == (menu.length - 1)) {
            th[1].className = 'menurighthover';
            break;
        }
    }
    event.target.className = 'menuhover';
}

function menu_out(event) {
    var menu = $get('menu').getElementsByTagName('a');
    var th = $get('menu').getElementsByTagName('th');

    for (var i = 0; i < menu.length; i++) {
        if (menu[i].href == event.target.href && i == 0) {
            th[0].className = 'menuleft';
            break;
        }
        else if (menu[i].href == event.target.href && i == (menu.length - 1)) {
            th[1].className = 'menuright';
            break;
        }
    }
    event.target.className = '';
}