json={ "people": [ 

　　{ "Col01": "姓名", "Col02":"年龄", "Col03": "手机" }

  ]} 

    var tHead= "<tr>";

    tHead+= "<td width='40' class='bg_thead center'>序号</td>"



    $.each(json.people, function(key, val) {

         tHead+=

    });