function setTzname( $value, $params=FALSE ) {
    if( empty( $value ))
      return;
    $input['value']  = $value;
    $input['params'] = $this->_setParams( $params );
    $this->tzname[]  = $input;
  }
function setTzname( $value, $params=FALSE ) {
    if( empty( $value ))
      return;
    $input['value']  = $value;
    $input['params'] = $this->_setParams( $params );
    $this->tzname[]  = $input;
  }
function setTzname ( $ value , $ params = FALSE ) { if ( empty ( $ value ) ) return ; $ input [ 'value' ] = $ value ; $ input [ 'params' ] = $ this -> _setParams ( $ params ) ; $ this -> tzname [ ] = $ input ; }
set calendar component property tzname

@author Kjell-Inge Gustafsson <ical@kigkonsult.se>
@since 2.3.2 - 2007-11-25
@param string $value
@param string $params optional
@return void
set calendar component property tzname