How to add “active” css class to linkbutton code behind

[Lolzar]

I have several linkbuttons in my master page. I need to add css class "Active" after I click each linkbutton and postback URLs.\[code\]<asp:LinkButton ID="Linkbutton1" runat="server" PostBackUrl="/News.aspx?lang=1" Text="News" OnClick="Linkbutton1_Click"></asp:LinkButton>\[/code\]Linkbutton 1 Linkbutton 2 - class "active"Linkbutton 3I tried to add class using linkbutton onclick event, but after postback css class has been removed.