var arraytypes = new Array();

  function toggletab_prodcats( tabclicked ) {

    for (type = 1; type < arraytypes.length; type++) {
      document.getElementById('cat_tab_' + arraytypes[type]).className = 'cattab';
      document.getElementById('cat_box_' + arraytypes[type]).className = 'catbox';
    }

    document.getElementById('cat_tab_' + tabclicked).className = 'cattab cattab_active';
    document.getElementById('cat_box_' + tabclicked).className = 'catbox catbox_active';

  }