jquery checkbox check all

<script type="text/javascript">
$(document).ready(function()
    {

                $('#chkAll').click(
                function()
                {
                    $("INPUT[type='checkbox']").attr('checked', $('#chkAll').is(':checked'));
                }
                )

  }
);
</script>

<asp:TemplateColumn HeaderText="" headerstyle-cssclass="NormalBold">
<HeaderTemplate>
        <input type='checkbox'  id='chkAll' >
</HeaderTemplate>

  <ItemTemplate>
        <asp:CheckBox ID="chkSelect"   runat="server" />
  </ItemTemplate>
</asp:TemplateColumn>