Extjs3.2，GridPanel无法加载后台传来的json字符串

[joyce_liu0216]

初学ExtJS，后台传回来的json始终无法显示到grid上，望高手帮助~~
html部分：

<div id="hello"></div>
<div id="element"></div>  

js部分：

Ext.onReady(function () {
 var store = new Ext.data.JsonStore({
        url: "http://localhost/getData.ashx?method=try&random=0.9640254709105345",
        autoload:true,
        root: "results",
        fields:["id","name","sex","email",name:"bornDate",type:"date",dateFormat:"Y-n-j"}]
    });    
    document.getElementById("element").innerHTML = "<select id='sexList'><option>男</option><option>女</option></select>";
    var colM = new Ext.grid.ColumnModel([{
        header: "姓名",
        dataIndex: "name",
        sortable: true,
        editor: new Ext.form.TextField()
    },
                    { header: "性别",
                        dataIndex: "sex",
                        editor: new Ext.form.ComboBox({ transform: "sexList", //select元素id
                            triggerAction: 'all',
                            lazyRender: true
                        })
                    },
                    { header: "出生日期",
                        dataIndex: "bornDate",
                        width: 120,
                        renderer: Ext.util.Format.dateRenderer('Y年m月d日'),
                        editor: new Ext.form.DateField({ format: 'Y年m月d日' })
                    },
                    { header: "电子邮件",
                        dataIndex: "email",
                        sortable: true,
                        editor: new Ext.form.TextField()
                    }
        ]);
    var grid = new Ext.grid.EditorGridPanel({
        renderTo: "hello",
        title: "学生基本信息管理",
        height: 200,
        width: 600,
        cm: colM,
        store: store,
        autoExpandColumn: 3,
        clicksToEdit: 1
    });

});

其中,url中http://localhost/getData.ashx?method=try&random=0.9640254709105345返回的内容为：

{results:[{id:1,name:'小王',email:'[e-mail]',sex:'男',bornDate:'1991-4-4'},{id:1,name:'小李',email:'[e-mail]',sex:'男',bornDate:'1992-5-6'},{id:1,name:'小兰',email:'[e-mail]',sex:'女',bornDate:'1993-3-7'}] }