在同一页面显示多个JavaScript统计图表

function loaded(){

  var totalWidth = getBodyNode().clientWidth;

  console.log("width in load: " + totalWidth);

  var aCharts = document.getElementsByTagName("canvas");

  for( var i = 0; i < aCharts.length; i++){

        aCharts[i].width = totalWidth / 6.5;

  }

  var option = {

      type: "pie",

      xAxisData: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],

      yAxisData: [12, 19, 3, 5, 2, 3],

      yAxisLabel: "Number of Votes"

  };

  for( var i = 1; i <= 6; i++ ){

        createChartOnCanvas("myChart" + i, option);

  }

  option.type = "bar";

  for( var i = 1; i <= 6; i++ ){

       createChartOnCanvas("barChart" + i, option);

  }

}