asp.net 动态treeview

js code //主要功能是实现复选框的全选择跟非全选
<script type="text/javascript" defer="defer">
        function OnTreeNodeChecked() {
            var ele = event.srcElement;
            if (ele.type == 'checkbox') {
                var childrenDivID = ele.id.replace('CheckBox', 'Nodes');
                var div = document.getElementById(childrenDivID);
                if (div != null) {
                    var checkBoxs = div.getElementsByTagName('INPUT');
                    for (var i = 0; i < checkBoxs.length; i++) {
                        if (checkBoxs[i].type == 'checkbox')
                            checkBoxs[i].checked = ele.checked;
                    }
                }
                OnTreeNodeChildChecked(ele);
            }
        }
        function OnTreeNodeChildChec