求教大神 setInterval 怎么不工作？不能定时更新数据

Question

  <script>
    setInterval("loadData()",5000);
        $(function loadData() 
         {

            $.ajax(
             {
                type: 'POST',
                dataType: 'text',
                data:'',
                async: false,
                cache: false,
                url: 'ajax-test.ashx',
                success: function (data) 
                  {
                    var jsonObject = eval('(' + data.split("|")[0] + ')');
                    var jsonObjectLTC = eval('(' + data.split("|")[1] + ')');       
                    var jsonObjectUSDT = eval('(' + data.split("|")[2] + ')');                      
                    var divcontent ="";
                    divcontent  = "<tr><td>" + jsonObject.ltc_cny.last + "</td>";</tr>";                       
                    $("#tbody").html(divcontent);
                   },
                error: function () {alert}
              });
             function A(){......}
             function B(){......}
                  .
                  .
                  .
                  .
             function N(){......}
          });

</script>

Answer 1

    setInterval("loadData()", 5000);
    function loadData() {
        $.ajax({
            type: 'POST',
            dataType: 'text',
            data: '',
            async: false,
            cache: false,
            url: 'ajax-test.ashx',
            success: function (data) {
                var jsonObject = eval('(' + data.split("|")[0] + ')');
                var jsonObjectLTC = eval('(' + data.split("|")[1] + ')');
                var jsonObjectUSDT = eval('(' + data.split("|")[2] + ')');
                var divcontent = "";
                divcontent = "<tr><td>LTC(比特儿-B)</td> <td align='center'>" + jsonObject.ltc_cny.last + "</td>";
                divcontent += "<td>" + changeresult(jsonObject.ltc_cny.last, jsonObjectLTC.result[0].Last) + "</td>";
                divcontent += "<td>LTC(比特儿-B)</td> <td align='center'>" + jsonObjectLTC.result[0].Last + "</td>";
                divcontent += "<td>" + changeprice(jsonObjectLTC.result[0].Last).toFixed(2) + "</td></tr>";///你这里字符串不闭合
                $("#tbody").html(divcontent);
            },
            error: function () { alert }
        });
    }
    $(loadData);//当参数出入的函数起名字无效，要分开来