问在动态创建的div上绘制多个NVD3.js图表的问题

EN

tables:
[
  {
    <some descriptors of the dataset>, 
    series: 
    [
      key: ...,
      values: 
        [
          { label: ..., value: ... },
          ...
        ]
    ]
  },
  ...
]

var report_data = <stupid way of getting data, will use AJAX later>;

var my_div = document.getElementById('show-report');

report_data.tables.forEach(
    function(table)
    {
        var newDiv = document.createElement('div');
        newDiv.id = 'report_' + table.name;

        var newHeader = document.createElement('h1');
        newHeader.textContent = table.name;
        newDiv.appendChild(newHeader);

                    // Generate style element for chart
        var newStyle = document.createElement('style');
        newStyle.textContent = '#' + table.name + '_chart svg {height: 500px;}';
        newDiv.appendChild(newStyle);

                    // Generate <div><svg /></div> where chart will be placed
        var chartDiv = document.createElement('div');
        chartDiv.id = table.name + '_chart';
        var svgEl = document.createElement('svg');
        chartDiv.appendChild(svgEl);
        newDiv.appendChild(chartDiv);

        // Here I write the table and append it to the main div. Omitted because of intense shame.

        my_div.appendChild(newDiv);

        //Draw chart
        nv.addGraph(
        function() 
        {
            var chart = nv.models.multiBarHorizontalChart()
            .x(function(d) { return d.label })
            .y(function(d) { return d.value })
            .margin({top: 30, right: 20, bottom: 50, left: 175})
            .tooltips(true)
            .showControls(true);

            chart.yAxis
            .tickFormat(d3.format(',.2f'));

            d3.select('#'+ table.name +'_chart svg')
            .datum(table.series)
            .transition().duration(250)
            .call(chart);

            nv.utils.windowResize(chart.update);

            return chart;
        }
        );
    }
);