I need to validate value on edit mode in gridview in clientside itself

<asp:TemplateField HeaderText="Nickname" ItemStyle-CssClass="row_1" ItemStyle-Width ="150" ItemStyle-Height="37px" ><EditItemTemplate> <asp:TextBox ID="txtnickname" runat="server" Text='<%#Eval("name") %>' >asp:TextBox>  <asp:RequiredFieldValidator ID="rfnickname" runat="server" ControlToValidate="txtnickname" ValidationGroup="edit">asp:RequiredFieldValidator> EditItemTemplate> <ItemTemplate> <asp:Label ID="lblitemnickname" runat="server" Text='<%#Eval("name") %>' /> ItemTemplate> asp:TemplateField>