多层级表格js

self.FishConfigList = ko.observableArray();
self.GetFishConfigList = function (dept_code, report_id) {
  self.FishConfigList.removeAll();
  var objdata = { DEPT_CODE: dept_code, REPORT_ID: report_id };

  KEAPIHelper.GetMeaasge(new ActionUrl.Quality().GetFishConfigList, objdata, function (data) {
    //Success

    if (data.Data) {
      self.FishConfigList(data.Data);





      //将数据加载进来
      var _data = $.map(data.Data, function(item) {
        return item;
      });
      function loadHtml(_data){
        var str = '';
        $.each(_data,function(i, item) {
          var _string = '';
          var _strings = '';
         if(item.WIDGETLIST==null){

         }else{
           $.each(item.WIDGETLIST,function(i, ite){
             _string += ite.WIDGET_NAME+'$';
             _strings+= ite.WIDGET_ID+'$';
           });
         }
          var pid = item.PARENT_ID ? 'data-tt-parent-id=' + item.PARENT_ID : '';
          str += '<tr data-tt-);
    }, false);
  }, function () {
    //取消
  });
}