如何将Date值从JSON返回到Google Visualization API

有没有办法在Google Visualization API中从 JSON中检索日期值？
这是 playground的snipplet请复制下面的代码

当你运行代码时,你不会有任何结果.您应该从我用注释标记的日期值中删除引号,以便检索结果.

function drawVisualization() {
var JSONObject = {
cols:
    [
        {id: 'header1',label: 'Header1',type: 'string'},{id: 'header2',label: 'Header2',type: 'date'}
    ],rows: 
    [
        {
            c:
                [
                    {v: 'Value1'},{v: "new Date(2010,3,28)"}  // <= This is the format I receive from WebService
                ]
        },{
            c:
                [
                    {v: 'Value2'},{v: new Date(2010,28)} // <=This is the format Google API accepts
                ]
        }
    ]
};

var data = new google.visualization.DataTable(JSONObject,0.5);

visualization = new google.visualization.Table(document.getElementById('table'));
visualization.draw(data,{'allowHtml': true});
}