function setOrganizer( $value, $params=FALSE ) {
    $value = str_replace ( 'MAILTO:', '', $value );
    $value = str_replace ( 'mailto:', '', $value );
    $this->organizer['value']  = $value;
    $this->organizer['params'] = $this->_setParams( $params );
    if( isset($this->organizer['params']['SENT-BY'] )) {
      if( 'MAILTO' == strtoupper( substr( $this->organizer['params']['SENT-BY'], 0, 6 )))
        $this->organizer['params']['SENT-BY'] = substr( $this->organizer['params']['SENT-BY'], 7 );
    }
  }