old_contents: var options = {
      container: document.getElementById('myChart'),
      title: {
          text: 'Try dragging the Navigator\'s handles to zoom in'
      },
      subtitle: {
          text: 'or the area between them to pan around'
      },
      data: [
          { label: 'Android', value: 56.9 },
          { label: 'iOS', value: 22.5 },
          { label: 'BlackBerry', value: 6.8 },
          { label: 'Symbian', value: 8.5 },
          { label: 'Bada', value: 2.6 },
          { label: 'Windows', value: 1.9 }
      ],
      series: [{
          type: 'column',
          xKey: 'label',
          yKeys: ['value']
      }],
      axes: [{
          type: 'number',
          position: 'left'
      }, {
          type: 'category',
          position: 'bottom'
      }],
      legend: {
          enabled: false
      },
      navigator: {
          enabled: true
      }
  };
  
  var chart = agCharts.AgChart.create(options);
  
  function toggleEnabled(value) {
      chart.navigator.enabled = value;
  }
new_contents: var options = {
      container: document.getElementById('myChart'),
      title: {
          text: 'Try dragging the Navigator\'s handles to zoom in'
      },
      subtitle: {
          text: 'or the area between them to pan around'
      },
      data: [
          { label: 'Android', value: 56.9 },
          { label: 'iOS', value: 22.5 },
          { label: 'BlackBerry', value: 6.8 },
          { label: 'Symbian', value: 8.5 },
          { label: 'Bada', value: 2.6 },
          { label: 'Windows', value: 1.9 }
      ],
      series: [{
          type: 'column',
          xKey: 'label',
          yKeys: ['value']
      }],
      axes: [{
          type: 'number',
          position: 'left'
      }, {
          type: 'category',
          position: 'bottom'
      }],
      legend: {
          enabled: false
      },
      navigator: {
          enabled: true
      }
  };
  
  var chart = agCharts.AgChart.create(options);
  
  function toggleEnabled(value) {
      options.navigator.enabled = value;
      agCharts.AgChart.update(chart, options);
  }
subject: Fix chart navigator example.