EXTJS 4.2 资料 控件之Grid 列鼠标悬停提示

  columns: [
                    { header: '序号', xtype: 'rownumberer', align: 'left', width:  },
                    { header: '货位编号', dataIndex: 'StorePosCode', width:  },
                    {
                        header: '货位名称', dataIndex: 'StorePosName', width: , renderer: function (v, ctx, record) {
                            ctx.tdAttr = " data-qtip = '这里是TIP内容!'";
                            return v;
                        }
                    },
                    { header: '备注', dataIndex: 'Note', width:  },
                    {
                        header: '操作', align: 'left', width: , renderer:
                        function (v, nv, v1) {
                            var Update = "<img src='/Resources/Images/16x16/blue16_020.gif'></img>" + '<a href="#" onClick="FunctionActionUpdate()">修改</a>';
                            var Delete = "<img src='/Resources/Images/16x16/blue16_013.gif'></img>" + '<a href="#" onClick="FunctionActionDelete()">删除</a>';
                            return Update + ' ' + Delete;
                        }
                    }
        ],