Hilighting <div> tag in Masterpage on redirection to content page

[Hansol]

I have link in Master page within the div tag. I want to highlight the div when I am clicking the link,in oredr to redirct to some content page. I have written the following code:\[code\] <li> <div id="div_test" runat="server"> <asp:LinkButton ID="lnk_test_menu" Font-Underline="false" ForeColor="Black" runat="server" Text="Test Link" CausesValidation="false" onclick="lnk_test_menu_Click1" > </asp:LinkButton></div> </li>\[/code\]Code in the cs page:\[code\] protected void lnk_test_menu_Click1(object sender, EventArgs e) { div_test.Attributes.Add("class", "testSelected"); Response.Redirect(Test.aspx"); }\[/code\]The div in the master page is not being selected on redirection. Could anybody help me on this?