LinkList in Javascript

    function LinkList() {

        var count = 0;

        var head = null;

        function Node() {

            var Data = null;

            var Next = null;

        }

        this.Count = function () {

            return count;

        }

        this.Add = function (data) {

            var nd = new Node();

            nd.Data = data;

            if (head) {

                nd.Next = head;

            }

            head = nd;

            count++;

        }

        this.Traverse = function () {

            var result = "";

            var current = head;

            while (current) {

                result = result + " --> " + current.Data;

                current = current.Next;

            }

            return result;

        }

    }

var mylist = new LinkList();



function AddToList() {

    var txtCtrl = document.getElementById('datatxt');

    var resCtrl = document.getElementById('result');

    if (txtCtrl && txtCtrl.value.length > 0) {

        mylist.Add(txtCtrl.value);

        if (resCtrl) {

            resCtrl.innerHTML = "" + txtCtrl.value + " added to list.";

        }

        txtCtrl.value = '';

    }

}

function PrintList() {

    var resCtrl = document.getElementById('result');

    if (resCtrl) {

        if (mylist.Count() > 0) {

            resCtrl.innerHTML = mylist.Traverse();

        }

        else {

            resCtrl.innerHTML = "List is empty.";

        }

    }

    var txtCtrl = document.getElementById('datatxt');

    if (txtCtrl) {

        txtCtrl.value = '';

    }

}

function GetCount() {

    var resCtrl = document.getElementById('result');

    if (resCtrl) {

        resCtrl.innerHTML = "List has " + mylist.Count() + " items.";

    }

    var txtCtrl = document.getElementById('datatxt');

    if (txtCtrl) {

        txtCtrl.value = '';

    }

}