datagrid 如何取javascript值

<asp:datagrid id="DataGrid1" runat="server" Width="632px" AutoGenerateColumns="False" OnItemDataBound="DataGrid1_ItemDataBound">
  <SelectedItemStyle HorizontalAlign="Center"></SelectedItemStyle>
  <EditItemStyle HorizontalAlign="Center"></EditItemStyle>
  <AlternatingItemStyle HorizontalAlign="Center"></AlternatingItemStyle>
  <ItemStyle HorizontalAlign="Center"></ItemStyle>
  <HeaderStyle HorizontalAlign="Center" VerticalAlign="Middle"></HeaderStyle>
  <FooterStyle HorizontalAlign="Center" VerticalAlign="Middle"></FooterStyle>
  <Columns>
  <asp:TemplateColumn Visible="False