text: google.charts.load('current', {packages: ['corechart', 'line']});
  // google.charts.setOnLoadCallback(plotChart);
  
  function plotChart(chartpoints,chartDiv) {
        var data = new google.visualization.DataTable();
        data.addColumn('datetime', 'Day');
        data.addColumn('number', 'PM10');
        // data.addColumn('number', 'Air');
        // data.addColumn('number', 'Humidity');
  
        // chartpoints.prepend(['Time','PM10']);
        data.addRows(chartpoints);
        // data.addRows([
        //   [0, 0, 0],    [1, 10, 5],   [2, 23, 15],  [3, 17, 9],   [4, 18, 10],  [5, 9, 5],
        //   [6, 11, 3],   [7, 27, 19],  [8, 33, 25],  [9, 40, 32],  [10, 32, 24], [11, 35, 27],
        //   [12, 30, 22], [13, 40, 32], [14, 42, 34], [15, 47, 39], [16, 44, 36], [17, 48, 40],
        //   [18, 52, 44], [19, 54, 46], [20, 42, 34], [21, 55, 47], [22, 56, 48], [23, 57, 49],
        //   [24, 60, 52], [25, 50, 42], [26, 52, 44], [27, 51, 43], [28, 49, 41], [29, 53, 45],
        //   [30, 55, 47], [31, 60, 52], [32, 61, 53], [33, 59, 51], [34, 62, 54], [35, 65, 57],
        //   [36, 62, 54], [37, 58, 50], [38, 55, 47], [39, 61, 53], [40, 64, 56], [41, 65, 57],
        //   [42, 63, 55], [43, 66, 58], [44, 67, 59], [45, 69, 61], [46, 69, 61], [47, 70, 62],
        //   [48, 72, 64], [49, 68, 60], [50, 66, 58], [51, 65, 57], [52, 67, 59], [53, 70, 62],
        //   [54, 71, 63], [55, 72, 64], [56, 73, 65], [57, 75, 67], [58, 70, 62], [59, 68, 60],
        //   [60, 64, 56], [61, 60, 52], [62, 65, 57], [63, 67, 59], [64, 68, 60], [65, 69, 61],
        //   [66, 70, 62], [67, 72, 64], [68, 75, 67], [69, 80, 72]
        // ]);
  
        var options = {
          title: 'Air Quality',
          legend: {position: 'none'},
          pointSize: 10,
          axes: {
            x :{0: {side: 'bottom'}}
          },
          hAxis: {
            title: 'Time'
          },
          vAxis: {
            title: 'PM10'
          },
          series: {
            1: {curveType: 'function'}
          }
        };
  
        var chart = new google.visualization.LineChart(document.getElementById(chartDiv));
        chart.draw(data, options);
      }