How To Write Condition On Client Side Within Gridview Itemtemplate

<asp:TemplateField  HeaderText="Period To " >
<ItemStyle Wrap="true" BorderWidth="1px" Width="10%" ></ItemStyle>
<ItemTemplate>
  <asp:Label ID="lblPeriodTo" runat="server" Text='<%#DataBinder.Eval(Container.DataItem, "TillDatePeriodTo").ToString()=="1"?"Till Date":DataBinder.Eval(Container.DataItem, "PeriodTo")%>'></asp:Label>                                              </ItemTemplate>
</asp:TemplateField>

Thanks
Alok Kumar Sharma