ztree 获取全部选中节点数据 _Web前端

ztree 获取所有选中节点数据
<!DOCTYPE html>
<HTML>
<HEAD>
    <TITLE> ZTREE DEMO - Standard Data </TITLE>
    <meta http-equiv="content-type" content="text/html; charset=UTF-8">
    <link rel="stylesheet" href="css/zTreeStyle/zTreeStyle.css" type="text/css">
    <link rel="stylesheet" href="css/demo.css" type="text/css">
    <script type="text/javascript" src="js/jquery-1.4.4.min.js"></script>
    <script type="text/javascript" src="js/jquery.ztree.core-3.4.js"></script>
    <script type="text/javascript" src="js/jquery.ztree.excheck-3.4.js"></script>
    <SCRIPT type="text/javascript">
        var setting = {    
            check:{
                enable:true
            },
            data:    {
                simpleData:{
                    enable:true
                }
            },
            callback:{
                onCheck:onCheck
            }
        };         
        var zNodes =[
            { id:1, pId:0, name:"随意勾选 1", open:false},
            { id:11, pId:1, name:"随意勾选 1-1", open:true},
            { id:111, pId:11, name:"随意勾选 1-1-1"},
            { id:112, pId:11, name:"随意勾选 1-1-2"},
            { id:12, pId:1, name:"随意勾选 1-2", open:true},
            { id:121, pId:12, name:"随意勾选 1-2-1"},
            { id:122, pId:12, name:"随意勾选 1-2-2"},
            { id:2, pId:0, name:"随意勾选 2",  open:false},
            { id:21, pId:2, name:"随意勾选 2-1"},
            { id:22, pId:2, name:"随意勾选 2-2", open:true},
            { id:221, pId:22, name:"随意勾选 2-2-1"},
            { id:222, pId:22, name:"随意勾选 2-2-2"},
            { id:23, pId:2, name:"随意勾选 2-13"}
        ];
        $(document).ready(function(){
            $.fn.zTree.init($("#treeDemo"), setting, zNodes);
        });
        function onCheck(e,treeId,treeNode){
            var treeObj=$.fn.zTree.getZTreeObj("treeDemo"),
            nodes=treeObj.getCheckedNodes(true),
            v="";
            for(var i=0;i<nodes.length;i++){
                v+=nodes[i].name + ",";
                alert(nodes[i].id); //获取选中节点的值
            }
        }   
    </SCRIPT>
</HEAD>
<BODY>
<div class="zTreeDemoBackground left">
    <ul id="treeDemo" class="ztree"></ul>
</div>
</BODY>
</HTML>