放一段选取treeview控件生成树形菜单复选框所有子节点的js代码

<script language="javascript" type="text/javascript">
    var Obj_;
    document.onclick=function()
    {
        if(event.srcElement.tagName=="INPUT")
        {
            Obj_=event.srcElement;
            getNextElement(event.srcElement);
        }
    }
    function getNextElement(srcObj)
    {
        var i=0;
        while(srcObj.tagName!="TABLE")
        {
            srcObj=srcObj.parentNode;
            i++;
            if(i>20) break;
        }
        //
       
        if(srcObj.nextSibling==null)
        {
            selectParentNode(srcObj);
            return;
        }
        if(srcObj.nextSibling.tagName=="DIV")
        {
            var targetObj=srcObj.nextSibling;
            selectThem(targetObj);
        }
//        else if(srcObj.nextSibling.tagName=="TABLE")
//        {
//            //
//        }
        selectParentNode(srcObj);
    }
    function selectThem(targetObj_)
    {
        var ChexBox_Obj=targetObj_.getElementsByTagName("INPUT");
        for(var i=0;i<ChexBox_Obj.length;i++)
        {
            ChexBox_Obj[i].checked=Obj_.checked;
        }
    }
    function selectParentNode(obj)
    {
        while(obj.parentNode.previousSibling.tagName=="TABLE")
        {
            //
            var parentObj=obj.parentNode;
            var ChexBox_brother=parentObj.getElementsByTagName("INPUT");
            var counter_=0;
            for(var i=0;i<ChexBox_brother.length;i++)
            {
                if(ChexBox_brother[i].checked) counter_++;
            }
            //
            var parentNContiner=obj.parentNode.previousSibling;
            var CheckB=parentNContiner.getElementsByTagName("INPUT");
            CheckB[0].checked=counter_>0?true:false;
            obj=parentNContiner;
        }
    }  
</script>

想必大家都是触类旁通的，这段代码适合vs2005中treeview控件生成的树形菜单，以下是代码片段：

<asp:TreeView ID="TreeView_1" ShowCheckBoxes="all" runat="server" ShowLines="true" >