Select De-Select all nodes of the Treeview in asp.net using jquery

//html

<asp:TreeView ID="TreeView1" ShowCheckBoxes="All" runat="server" NodeIndent="15"   >

                            <HoverNodeStyle Font-Underline="True" ForeColor="#6666AA" />

                            <NodeStyle Font-Names="Arial" Font-Size="9pt" ForeColor="Black" HorizontalPadding="1px"

                                NodeSpacing="0px" VerticalPadding="1px" ></NodeStyle>

                            <ParentNodeStyle Font-Bold="False" />

                        </asp:TreeView>

<script>

Sys.Application.add_load(jScript);

                function jScript() {

                    $("[id*=TreeView1] input[type=checkbox]").bind("click", function () {

                        var table = $(this).closest("table");

                        if (table.next().length > 0 && table.next()[0].tagName == "DIV") {

                            //Is Parent CheckBox

                            var childDiv = table.next();

                            var isChecked = $(this).is(":checked");

                            $("input[type=checkbox]", childDiv).each(function () {

                                if (isChecked) {

                                    $(this).attr("checked", "checked");

                                } else {

                                    $(this).removeAttr("checked");

                                }

                            });

                        } else {

                            //Is Child CheckBox

                            var parentDIV = $(this).closest("DIV");

                            if ($("input[type=checkbox]", parentDIV).length == $("input[type=checkbox]:checked", parentDIV).length) {

                                $("input[type=checkbox]", parentDIV.prev()).attr("checked", "checked");

                            } else {

                                $("input[type=checkbox]", parentDIV.prev()).removeAttr("checked");

                            }

                        }

                    });

                }

</script>

//result