load使用上了为什么有错？哪里出错了？

[随我歌唱]

<link rel="stylesheet" type="text/css" href="../ext-3.2.1/resources/css/ext-all.css"/>
<script type="text/javascript" src="../ext-3.2.1/adapter/ext/ext-base.js"></script>
<script type="text/javascript" src="../ext-3.2.1/ext-all.js"></script>
<script type="text/javascript">
Ext.onReady(function(){
var store=new Ext.data.JsonStore({
url:"link.ejf?cmd=list",
totalProperty:"result",
root:"rows",
fields:["title",{name:'username',mapping:'author'},
{name:'loginTimes',type:'int'},
{name:'lastLoginTimes',mapping:'loginTime',type:'date'}]
});
store.load();
});
</script>

[yanyuchonglou]

美女，计算机说是什么错啊？