menu bar tab selection color change

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ASP.NET

CSS

HTML

Hi

In my site I'am using following code for menu bar in my master page,

<asp:Menu ID="NavigationMenu" runat="server" CssClass="menu" EnableViewState="false" IncludeStyleBlock="false" Orientation="Horizontal">
                   <Items>
                       <asp:MenuItem NavigateUrl="~/Default.aspx" Text="Home"/>
                       <asp:MenuItem NavigateUrl="~/About.aspx" Text="About"/>
<asp:MenuItem NavigateUrl="#" Text="Contact Us"/>
                   </Items>
               </asp:Menu>

but when I click on home tab then I wan't to change that home tag color when page redirect to contain page .How to do this.