docs: function columnsVisibleFun() {
      var oThis = this,
          w = 0;
      this.firstColumn = true;
      this.overWidthVisibleColumnArr = new Array();
      $.each(this.gridCompColumnArr, function () {
          if (this.options.visible) {
              w += parseInt(this.options.width);
              if (this.options.width > this.options.realWidth) {
                  oThis.overWidthVisibleColumnArr.push(this);
              }
              this.firstColumn = oThis.firstColumn;
              oThis.firstColumn = false;
              oThis.lastVisibleColumn = this;
              oThis.lastVisibleColumnWidth = this.options.width;
          }
      });
      this.contentRealWidth = w;
  }