/**
   * Alert Dialog
   */
  function ext_alert(msg)
  {
    return $('<div>'+msg+'</div>').dialog({
      title: 'HappyIsland',
      modal: true,
      resizable: false,
      width: 564,
      height: 432
    });
  }
  
  /**
   * Confirm Dialog
   */
  function ext_confirm(msg, callback)
  {
    $('<div>'+msg+'</div>').dialog({
      title: 'HappyIsland',
      modal: true,
      resizable: false,
      width: 564,
      height: 432,
      buttons: {
        'Si': function()
        { 
          $(this).dialog('close');
          switch(typeof callback)
          {
            case 'string':
              window.location.href = callback;
              break;
            case 'function':
              callback();
              break;
            case 'object':
              if (typeof callback[0].submit == 'function' )
              {
                callback[0].submit(); // JQuery object
              }
              else if (typeof callback.submit == 'function' )
              {
                callback.submit();    // DOM object
              }
              break;
            default:
              break;
          }
        },
        'No': function()
        {
          $(this).dialog('close');
        }
      }
    });
    return false;
  }