 'Truck&nbsp;14'},
    {id: 15, content: 'Truck&nbsp;15'},
    {id: 16, content: 'Truck&nbsp;16'},
    {id: 17, content: 'Truck&nbsp;17'},
    {id: 18, content: 'Truck&nbsp;18'},
    {id: 19, content: 'Truck&nbsp;19'},
    {id: 20, content: 'Truck&nbsp;20'},
    {id: 21, content: 'Truck&nbsp;21'},
    {id: 22, content: 'Truck&nbsp;22'},
    {id: 23, content: 'Truck&nbsp;23'},
    {id: 24, content: 'Truck&nbsp;24'},
    {id: 25, content: 'Truck&nbsp;25'},

  ]);

  // create items
  var items = new vis.DataS