function toggle( modpage ) {
 switch ( modpage ) {
  case 'addtorrent_info' : {
   document.getElementById( 'torrenturl' ).style.display = 'none';
   break;
  }
  case 'torrent_files' : {
   var uls = document.getElementsByTagName( 'ul' );
   for ( i = 0; i < uls.length; i++ ) {
    if ( uls.item( i ).getAttribute( 'class' ) == 'directory' ) {
     uls.item( i ).style.display='none';
    }
   }
   break;
  }
 }
}