var global_extender;
var global_contentID;

function pageLoad() {
    global_extender = $find('cpe'); //this would be
    //myLightbox = new Lightbox();
    //extender.add_expanded(function() { alert('expanded'); });  
}

function menu_click(contentID) {
    var state = eval(global_extender.get_ClientState());
    if (state) {
        showContent(contentID);
    }
    else {
        if (contentID != global_contentID) {
            global_extender.add_collapsed(collapsed);
        }
    }
    global_contentID = contentID;
    global_extender.togglePanel();
}

function showContent(id) {
    //var pnl = $get('pnlContent');
    // hide others
    for(var i = 1; i <= 5; i++)
    {
        $get( 'div' + i ).style.display = 'none';
    }   
    $get(id).style.display = 'block';
}

function collapsed() {
    global_extender.remove_collapsed(collapsed);
    showContent(global_contentID);
    global_extender.togglePanel();
}