Enable Disable TextBox controls in GridView Row when CheckBox Checked Unchecked using JavaScript and jQuery in ASP.Net

    <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
    <script type="text/javascript">
        $("[id*=chkHeader]").live("click", function () {
            var chkHeader = $(this);
            var grid = $(this).closest("table");
            $("input[type=checkbox]", grid).each(function () {
                if (chkHeader.is(":checked")) {
                    $(this).attr("checked", "checked");
                    var td = $("td", $(this).closest("tr"));
                    td.css({ "background-color": "#A1DCF2" });
                    $("input[type=text]", td).removeAttr("disabled");
                } else {
                    $(this).removeAttr("checked");
                    var td = $("td", $(this).closest("tr"));
                    td.css({ "background-color": "#FFF" });
                    $("input[type=text]", td).attr("disabled", "disabled");
                }
            });
        });
        $("[id*=chkRow]").live("click", function () {
            var grid = $(this).closest("table");
            var chkHeader = $("[id*=chkHeader]", grid);
            if (!$(this).is(":checked")) {
                var td = $("td", $(this).closest("tr"));
                td.css({ "background-color": "#FFF" });
                chkHeader.removeAttr("checked");
                $("input[type=text]", td).attr("disabled", "disabled");
            } else {
                var td = $("td", $(this).closest("tr"));
                td.css({ "background-color": "#A1DCF2" });
                $("input[type=text]", td).removeAttr("disabled");
                if ($("[id*=chkRow]", grid).length == $("[id*=chkRow]:checked", grid).length) {
                    chkHeader.attr("checked", "checked");
                }
            }
        });
    </script>
    <asp:GridView ID="GridView1" CssClass="Grid" runat="server" Width="300" HeaderStyle-BackColor="#3AC0F2"
        HeaderStyle-ForeColor="White" AutoGenerateColumns="false">
        <Columns>
            <asp:TemplateField>
                <HeaderTemplate>
                    <asp:CheckBox ID="chkHeader" runat="server" />
                </HeaderTemplate>
                <ItemTemplate>
                    <asp:CheckBox ID="chkRow" runat="server" />
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="Name">
                <ItemTemplate>
                    <asp:TextBox ID="txtName" runat="server" Text='<% # Eval("Name") %>' Enabled="false"></asp:TextBox>
                </ItemTemplate>
            </asp:TemplateField>
            <asp:TemplateField HeaderText="Country">
                <ItemTemplate>
                    <asp:TextBox ID="txtCity" runat="server" Text='<% # Eval("Country") %>' Enabled = "false"></asp:TextBox>
                </ItemTemplate>
            </asp:TemplateField>
        </Columns>
    </asp:GridView>

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!this.IsPostBack)
        {
            DataTable dt = new DataTable();
            dt.Columns.AddRange(new DataColumn[2] { new DataColumn("Name"), new DataColumn("Country") });
            dt.Rows.Add("John Hammond", "Canada");
            dt.Rows.Add("Rick Stewards", "United States");
            dt.Rows.Add("Huang He", "China");
            dt.Rows.Add("Robert Williams", "England");
            GridView1.DataSource = dt;
            GridView1.DataBind();
        }
    }