/**
 * Update using prototype and cancel any event, update the div with loading message
 **/
function updateLoad(div, url, obj) {
    var loading = document.createElement('div');
    loading.style.textAlign = 'center';
    loading.innerHTML = '<h3>loading...</h3>';
    $(div).appendChild(loading);
    new Ajax.Updater(div, url);
    return false;
}