How to highlight selected link in Repeater control

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C#

ASP.NET

iam using custom pagination in my gridview and uses Repeater control for showing page indexes..the code is

<asp:Repeater ID="rptPager"  runat="server" >
<ItemTemplate>
    <asp:LinkButton ID="lnkPage" runat="server" Text='<%#Eval("Text") %>' CommandArgument='<%# Eval("Value") %>'
      Enabled='<%# Eval("Enabled") %>' OnClick="Page_Changed" >
    </asp:LinkButton>
</ItemTemplate>
</asp:Repeater>

the page index is like 1 2 3 4 5 etc

here what i want is when i click on one link it should be highlighted...

code of Page_Changed event

protected void Page_Changed(object sender, EventArgs e)
        {
            pageIndex = int.Parse((sender as LinkButton).CommandArgument);
            //here i got the corresponding value
            //if i click on 1 it should be 1
            //if i click on 2 it should be 2
        }