Ext动态给panel的html属性赋值

Ext.onReady(function(){
    var p = new Ext.Panel({

        id:'my_panel',
        title: 'My Panel',
         renderTo: document.body,
        html:"test测试"
    });
});

 

 

var _p =Ext.getCmp("my_panel");
   _p.body.update(<a href='XXX' >下载</a>");
 }