calling Treeview checkbox checked event using jQuery Ajax

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C#

ASP.NET

Javascript

Ajax

jQuery

I've generate one dynamic treeview checkbox, now while i select one checkbox one javascript function is fired, inside that function i call one ASP.net webmethod using Jquery Ajax which is not executed.

Here is my javascript function

<script type="text/javascript">
        function OnTreeClick(evt) {
            var src = window.event != window.undefined ? window.event.srcElement : evt.target;
            var isChkBoxClick = (src.tagName.toLowerCase() == "input" && src.type == "checkbox");
            if (isChkBoxClick) {
                if (src.checked == true) {
                    var nodeText = getNextSibling(src).innerText || getNextSibling(src).innerHTML;

                    var nodeValue = GetNodeValue(getNextSibling(src));

                    document.getElementById("label").innerHTML += nodeText + ",";

                    //send value to server side
                    $.ajax({
                    type: "POST",
                    url: "Default.aspx/services",
                    data: { "Name": nodeValue },
                    contentType: "application/json; charset=utf-8",
                    dataType: "json",
                    success: OnSuccess,
                    failure: function (response) {
                    alert(response);
                    }
            });
                    //ends
                }
                else {
                    var nodeText = getNextSibling(src).innerText || getNextSibling(src).innerHTML;
                    var nodeValue = GetNodeValue(getNextSibling(src));
                    var val = document.getElementById("label").innerHTML;
                    document.getElementById("label").innerHTML = val.replace(nodeText + ",", "");
                }
                var parentTable = GetParentByTagName("table", src);
                var nxtSibling = parentTable.nextSibling;
                //check if nxt sibling is not null & is an element node
                if (nxtSibling && nxtSibling.nodeType == 1) {
                    //if node has children
                    if (nxtSibling.tagName.toLowerCase() == "div") {
                        //check or uncheck children at all levels
                        CheckUncheckChildren(parentTable.nextSibling, src.checked);
                    }

                }
                //check or uncheck parents at all levels
                CheckUncheckParents(src, src.checked);
            }
        }

        function CheckUncheckChildren(childContainer, check) {
            var childChkBoxes = childContainer.getElementsByTagName("input");
            var childChkBoxCount = childChkBoxes.length;
            for (var i = 0; i < childChkBoxCount; i++) {
                childChkBoxes[i].checked = check;
            }
        }

        function CheckUncheckParents(srcChild, check) {
            var parentDiv = GetParentByTagName("div", srcChild);
            var parentNodeTable = parentDiv.previousSibling;
            if (parentNodeTable) {
                var checkUncheckSwitch;
                //checkbox checked
                if (check) {
                    var isAllSiblingsChecked = AreAllSiblingsChecked(srcChild);
                    if (isAllSiblingsChecked)
                        checkUncheckSwitch = true;

                    else
                        return; //do not need to check parent if any(one or more) child not checked
                }
                else //checkbox unchecked
                {
                    checkUncheckSwitch = false;
                }

                var inpElemsInParentTable = parentNodeTable.getElementsByTagName("input");
                if (inpElemsInParentTable.length > 0) {
                    var parentNodeChkBox = inpElemsInParentTable[0];
                    parentNodeChkBox.checked = checkUncheckSwitch;
                    //do the same recursively
                    CheckUncheckParents(parentNodeChkBox, checkUncheckSwitch);
                }
            }
        }

        function AreAllSiblingsChecked(chkBox) {
            var parentDiv = GetParentByTagName("div", chkBox);
            var childCount = parentDiv.childNodes.length;
            for (var i = 0; i < childCount; i++) {
                if (parentDiv.childNodes[i].nodeType == 1) {
                    //check if the child node is an element node
                    if (parentDiv.childNodes[i].tagName.toLowerCase() == "table") {
                        var prevChkBox = parentDiv.childNodes[i].getElementsByTagName("input")[0];
                        //if any of sibling nodes are not checked, return false
                        if (!prevChkBox.checked) {
                            return false;
                        }
                    }
                }
            }
            return true;
        }

        //utility function to get the container of an element by tagname
        function GetParentByTagName(parentTagName, childElementObj) {
            var parent = childElementObj.parentNode;
            while (parent.tagName.toLowerCase() != parentTagName.toLowerCase()) {
                parent = parent.parentNode;
            }
            return parent;
        }

        function getNextSibling(element) {
            var n = element;
            do n = n.nextSibling;
            while (n && n.nodeType != 1);
            return n;
        }

        //returns NodeValue
        function GetNodeValue(node) {
            var nodeValue = "";
            var nodePath = node.href.substring(node.href.indexOf(",") + 2, node.href.length - 2);
            var nodeValues = nodePath.split("\\");
            if (nodeValues.length > 1)
                nodeValue = nodeValues[nodeValues.length - 1];
            else
                nodeValue = nodeValues[0].substr(1);
            return nodeValue;
        }
        function OnSuccess(response) {
            alert(response.d);
        }
    </script>

And here is the asp treeview control

<asp:TreeView ID="tvTables" runat="server"  ShowCheckBoxes="Leaf" OnClick="OnTreeClick(event)">
                    </asp:TreeView>

Please help me to solve this.

Thanks in advance.