javascript如何设置获取GridView模板列的值

Question

如题。 比如如下一个GridView  <asp:GridView ID="GridView1" runat="server" AutoGenerateColumns="False"         DataKeyNames="NewsID" DataSourceID="SqlDataSource1">        <Columns>            <asp:BoundField DataField="Title" HeaderText="Title" SortExpression="Title" />            <asp:BoundField DataField="AddTime" HeaderText="AddTime"                 SortExpression="AddTime"  DataFormatString="{0:yyyy-MM-dd}"/>            <asp:BoundField DataField="AccountID" HeaderText="AccountID"                 SortExpression="AccountID" />            <asp:BoundField DataField="NewsID" HeaderText="NewsID" InsertVisible="False"                 ReadOnly="True" SortExpression="NewsID" />                <asp:TemplateField>                <ItemTemplate>                <asp:TextBox ID="txtbx" runat="server" Text='<%# Eval("AccountID") %>'></asp:TextBox>                </ItemTemplate>                </asp:TemplateField>        </Columns>    </asp:GridView>   我要用javascript获取txtbx的值，然后根据这个值做些修改。用什么能实现。谢谢各位啦。