$("#heatmapCon input").keypress(function(e) {
  //Enter pressed
  if(e.which == 13) {
    var value = $(this).val();
    var heatmapOptions = {
      height: years*140+30,
      width: Math.max($('#heatmapCon').width(),900),
      fontName: 'Roboto',
      titleTextStyle: titleTextStyle,
      colorAxis: {
        minValue: 0,
        colors: ['#ffffff', '#0027ff',  '#00127d'],
        maxValue: value
       },
       calendar: {
          cellSize: 15,
        }
      };
    heatmap.draw(heatmapData,heatmapOptions);
  }
});