ExtJS Grid使用SimpleStore、多选框的方法

复制代码代码如下:
///<reference path="./vswd-ext_2.0.2.js" />
Ext.onReady（function（）{
var data = [
[1,"wilson.fu",10],
[2,"wilson.fu2",20],
[3,"wilson.fu3",30]
];

var sqldata = new Array（） ;
for（var i=0;i<10;i++）
{
sqldata.push（[i.toString（）,"wilson.fu" + i.toString（）,10*i]）;
}

var sm = new Ext.grid.CheckboxSelectionModel（{handleMouseDown:Ext.emptyFn}）;
var cm = new Ext.grid.ColumnModel（[
sm,
{header:"编号",dataIndex:"id",sortable:true},
{header:"姓名",dataIndex:"name"},
{header:"排序值",dataIndex:"ordernum",sortable:true}
]）;

var store = new Ext.data.SimpleStore（{
fields:[
{name:"id"},
{name:"name"},
{name:"ordernum"}
]
}）;

store.loadData（sqldata）;

var gd = new Ext.grid.GridPanel（{
renderTo:"grid",
cm:cm,
sm:sm,
store:store,
loadMask:true
}）;

Ext.get（"btn"）.on（"click",function（）{
var selections = gd.getSelectionModel（）.getSelections（）;
debugger
//得到选择的行的值
}）;

}）;