Treeview中checkbox选择问题

-----------Treeview中checkbox选择问题

protected void Page_Load(object sender, EventArgs e)
{
      // Load sample data only once, when the page is first loaded.
      if (!IsPostBack)
      {
            SampleTreeView.Attributes.Add("onClick","OnCheckEvent()");
      }
}


相关js:


<script language="javascript">
    //checkbox点击事件
    function OnCheckEvent()
    {
        var objNode = event.srcElement;
        if(objNode.tagName != "INPUT" || objNode.type != "checkbox")
            return;
        //获得当前树结点
        var ck_ID = objNode.getAttribute("ID");
        var node_ID = ck_ID.substring(0,ck_ID.indexOf("CheckBox")) + "Nodes";
        var curTreeNode = document.getElementById(node_ID);
        //级联选择
        SetChildCheckBox(curTreeNode,objNode.checked);
        SetParentCheckBox(objNode);

    }
    
    //子结点字符串
    var childIds = "";
    //获取子结点ID数组
    function GetChildIdArray(parentNode)
    {
        if (parentNode == null)
            return;
        var childNodes = parentNode.children;
        var count = childNodes.length;
        for(var i = 0;i < count;i ++)
        {
            var tmpNode = childNodes[i];
            if(tmpNode.tagName == "INPUT" && tmpNode.type == "checkbox")
            {
                childIds = tmpNode.id + ":" + childIds;
            }
            GetChildIdArray(tmpNode);
        }
    }
    
    //设置子结点的checkbox
    function SetChildCheckBox(parentNode,checked)
    {
        if(parentNode == null)
            return;
        var childNodes = parentNode.children;
        var count = childNodes.length;
        for(var i = 0;i < count;i ++)