docs: function createContentLeftMultiSelectRow(row, displayFlag) {
      var displayStr = '';
      if (!this.options.autoExpand && row.level > 0 && displayFlag != 'block') {
          displayStr = 'display:none;';
      }
      var tmpcheck = row.value["$_#_@_id"];
      if (!tmpcheck) {
          tmpcheck = setTimeout(function () {});
      }
  
      var rootObj = row.value;
      var objAry = this.selectRows;
      var re = objCompare(rootObj, objAry);
      var heightStr = '';
  
      if (!this.options.needResetHeight) {
          heightStr = 'height:' + (this.options.rowHeight + 1) + 'px;';
      }
  
      var createFlag = true;
      if (typeof this.options.onBeforeCreateLeftMul == 'function') {
          var obj = {
              gridObj: this,
              rowObj: row
          };
          createFlag = this.options.onBeforeCreateLeftMul.call(this, obj);
      }
      if (gridBrowser.isIE8) {
          //var	htmlStr = '<div style="width:' + this.multiSelectWidth + 'px;' + displayStr + '" class="u-grid-content-multiSelect " ><input class="u-grid-multi-input" id="checkbox'+tmpcheck+'" type="checkbox" value="1" ></div>'
          var htmlStr = '<div style="width:' + this.multiSelectWidth + 'px;' + heightStr + displayStr + '" class="u-grid-content-multiSelect " >';
          if (createFlag) htmlStr += '<span class="u-grid-checkbox-outline" id="checkbox' + tmpcheck + '" value="1"><span class="u-grid-checkbox-tick-outline"></span></span>';
          htmlStr += '</div>';
      } else {
          if (re) {
              var htmlStr = '<div style="width:' + this.multiSelectWidth + 'px;' + heightStr + displayStr + '" class="u-grid-content-multiSelect checkbox check-success u-grid-content-sel-row" >';
              if (createFlag) htmlStr += '<span class="u-grid-checkbox-outline  is-checked" id="checkbox' + tmpcheck + '" value="1"><span class="u-grid-checkbox-tick-outline"></span></span>';
              htmlStr += '</div>';
          } else {
              var htmlStr = '<div style="width:' + this.multiSelectWidth + 'px;' + heightStr + displayStr + '" class="u-grid-content-multiSelect checkbox check-success" >';
              if (createFlag) htmlStr += '<span class="u-grid-checkbox-outline" id="checkbox' + tmpcheck + '" value="1"><span class="u-grid-checkbox-tick-outline"></span></span>';
              htmlStr += '</div>';
          }
          //var htmlStr = '<div style="width:' + this.multiSelectWidth + 'px;' + displayStr + '" class="u-grid-content-multiSelect checkbox check-success" ><input class="u-grid-multi-input" id="checkbox'+tmpcheck+'" type="checkbox" value="1" ><label for="checkbox'+tmpcheck+'"></label></div>'
      }
      return htmlStr;
  }