anchor.diff:        }
       }
   
  -    Plotly.newPlot('#graph', p, layout)
  +    Plotly.newPlot('chart', p, layout)
     }
   </script>
  
positive.code:   }
  
    function mapPoints(json, axis) {
      return json.map(function(item){ return item[axis(json)] })
    }
  
    function points(json) {
      return {
        x: 'datetime',
        y: 'value'
      }
    }
  
  
negative.code: <div id='chart' class='chart'></div>
  
  <script>
    $.getJSON(document.URL, function(json) {
      graph(json['glucose'])
    })
  
  