extjs创建grid表格，怎样实现双击表格里某一行数据，跳转到另一个panel页面？

listeners : {
            dblclick : {
                element : 'body',
                fn : function() {
                    var _record = sm.getSelection();
                    scount = _record.length;
                    if (scount == 0) {//未选择
                        Ext.Msg.alert('友情提示', '请选择...！');
                        return false;
                    }
                   addTab(false);

                }
            }
        },

 

-------------------
function addTab (closable) {
        ++index;
        tabs.add({
            title: 'New Tab ' + index,
            iconCls: 'tabs',
            html: 'Tab Body ' + index + '

' + Ext.example.bogusMarkup,
            closable: !!closable
        }).show();
    }