miniui-tree循环懒加载tree.loadNode(node)问题 - jQuery MiniUI

<body>
<h1>LazyTree 懒加载树形</h1>
<input type="button" value="刷新节点" onclick="refreshNode()"/>
<input type="button" value="加载节点" onclick="expandNode()"/>
<ul id="tree1" class="mini-tree" url="../data/TreeService.aspx?method=LoadNodes" style="width:300px;height:200px;padding:5px;"
showTreeIcon="true" textField="name" onbeforeload="onBeforeTreeLoad" expanded="true"
idField="id" parentField="pid" resultAsTree="false" >
</ul>
<script type="text/javascript">
mini.parse();
function onBeforeTreeLoad(e) {
var tree = e.sender; //树控件
var node = e.node; //当前节点
var params = e.params; //参数对象
//可以传递自定义的属性
params.myField = "123"; //后台：request对象获取"myField"
}
function refreshNode() {
var tree = mini.get("tree1");
var node = tree.getSelectedNode();
if (node) {
tree.loadNode(node);
}
}
function expandNode() {
var tree = mini.get("tree1");
var rootnode = tree.getRootNode();
if (rootnode) {
rootnode = tree.getChildNodes(rootnode);
if (rootnode && rootnode.length > 0) {
var DesignUnitNode = rootnode[0];
var ProjectSortNodes = DesignUnitNode.children;
if (ProjectSortNodes && ProjectSortNodes.length > 0) {
for (var i = 0; i < ProjectSortNodes.length; i++) {
tree.loadNode(ProjectSortNodes[i]);
}
}
}
}
}
</script>
<div class="description">
<h3>Description</h3>
<p>
</p>
</div>
</body>

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