带有多个yaxis和复选框的jQuery Flot

$.plot("#placeholder", data, {
        xaxis: {
          tickDecimals: 0
        },
        yaxis: [{
          position: "left",
          min: 0,
          tickFormatter: function (val, axis) {
            return val + "v";
          },
        },{
          min: 0,
          position: "right",
          tickFormatter: function (val, axis) {
            return val + "M";
          },
        }]
});

但我不明白为什么我的代码在这里不起作用: Fiddle here