TextBox TextChanged Event Inside a GridView Using JavaScript

This is my GridView SourceCode:-

<asp:GridView ID="GrdCarry" runat="server" AutoGenerateColumns="False" CssClass="GridViewDefault"

                        AllowPaging="True" ShowFooter="true"    OnRowCreated="GrdCarry_RowCreated">

                        <Columns>

                            <asp:TemplateField>

                                <HeaderTemplate>

                                    <asp:CheckBox ID="ChkTypehead" runat="server" onclick="javascript:SelectAllCheckboxes(this);" />

                                </HeaderTemplate>

                                <ItemTemplate>

                                    <asp:CheckBox ID="ChkType" runat="server" />

                                </ItemTemplate>

                            </asp:TemplateField>

                            <asp:TemplateField>

                                <HeaderTemplate>

                                    <asp:Label ID="LblSl" runat="server" Text="Sl No"></asp:Label>

                                </HeaderTemplate>

                                <ItemTemplate>

                                    <asp:Label ID="LblSlNo" runat="server" Text="<%# Container.DataItemIndex + 1 %>"></asp:Label>

                                </ItemTemplate>

                            </asp:TemplateField>

                            <asp:TemplateField>

                                <HeaderTemplate>

                                    Employee Name</HeaderTemplate>

                                <ItemTemplate>

                                    <asp:HiddenField ID="hdnEmployeeID" runat="server" Value='<%#Eval("Employee_ID") %>' />

                                    <asp:Label ID="lblEmpName" runat="server" Text='<%#Bind("NAME") %>'></asp:Label>

                                </ItemTemplate>

                            </asp:TemplateField>

                            <asp:TemplateField>

                                <HeaderTemplate>

                                    Balance Days

                                </HeaderTemplate>

                                <ItemTemplate>

                                    <asp:Label ID="lblBalanceDays" runat="server" Text='<%#Bind("Balance_Days") %>'></asp:Label>

                                    <asp:HiddenField ID="hdnBalanceDays" runat="server" Value='<%#Bind("Balance_Days") %>' />

                                </ItemTemplate>

                            </asp:TemplateField>

                           

                            <asp:TemplateField>

                                <HeaderTemplate>

                                    <asp:Label ID="LblleaveCFDays" runat="server" Text="Leave CF Days"></asp:Label>

                                </HeaderTemplate>

                                <ItemTemplate>

                                    <asp:TextBox ID="TxtleaveCFDays" AutoPostBack="true" runat="server"></asp:TextBox>

                                </ItemTemplate>

                                <FooterTemplate>

                                   

                                </FooterTemplate>

                            </asp:TemplateField>

                            <asp:TemplateField>

                                <ItemTemplate>

                                    <asp:HiddenField ID="hdnMaxCarryFrwd" Value='<%#Eval("Max_Carry_Forward_Leaves") %>'

                                        runat="server" />

                                </ItemTemplate>

                            </asp:TemplateField>

                        </Columns>

                    </asp:GridView>

This is my GridView Row created Event:-

protected void GrdCarry_RowCreated(object sender, GridViewRowEventArgs e)

        {

            if (e.Row.RowType == DataControlRowType.DataRow)

            {

                int index = e.Row.RowIndex;

                e.Row.Attributes.Add("OnChange", "CheckValidData(" + index + ")");

             

            }

        }

This is my Javascript Function:-

<head runat="server">

    <link href="../../css/hrms_test.css" rel="stylesheet" type="text/css" />

    <script src="../../Scripts/jquery-1.7.1.js" type="text/javascript"></script>

    <script src="../../Scripts/jquery-1.7.1.min.js" type="text/javascript"></script>

    <script type="text/javascript">

        function SelectAllCheckboxes(chk) {

            $('#<%=GrdCarry.ClientID %>').find("input:checkbox").each(function () {

                if (this != chk) {

                    this.checked = chk.checked;

                }

            });

        }

        function CheckValidData(i) {

          

            var MaxCarryCheck = $("#GrdCarry_TxtleaveCFDays_" + i + "").val();

            var x = parseInt(MaxCarryCheck, 10);

            var MaxCarryLeaveDays = $("#GrdCarry_hdnMaxCarryFrwd_" + i + "").val();

            var y = parseInt(MaxCarryLeaveDays, 10);

            var BalanceDays = $("#GrdCarry_hdnBalanceDays_" + i + "").val();

            var z = parseInt(BalanceDays, 10);

            if (x > z) {

                alert('you are Exceeding Balance Days :' + BalanceDays);

                $("#GrdCarry_TxtleaveCFDays_" + i + "").val('');

              }

            else if (x > y) {

                alert('you can not Exceed Maximum Carry Forward Days:' + MaxCarryLeaveDays);

                $("#GrdCarry_TxtleaveCFDays_" + i + "").val('');

             

            }

         

        }

    </script>

    <title></title>

</head>

Thanks Shibashish Mohanty