how to use will_paginate with ajax

Hi
I have a tabbed view in the file show_details.rhtml as follows

attachments---contacts

<li><a href="#" rel="view_sd_attachment_details">Attachments</a></li>
<li><a href="#" rel="view_sd_contact_details">Contacts</a></li>
<div class="tabcontentstyle">

<div id="view_sd_attachment_details" class="tabcontent">
<%= render :partial => 'service_desk_part/view_sd_attachment_details'%>
</div>

<div id="view_sd_contact_details" class="tabcontent">
<%= render :partial => 'service_desk_part/view_sd_contact_details' %>
</div>
</div>

When the page loads attachmens tab is highlightd..I have pagination for
contacts(say 100 total contacts
and pagination 20 item per page...And i implemented it with
will_paginate)..BUT MY PROBLEM IS WHEN PAGINATING contacts THE NEXT PAGE
COMES BUT ATTACHMENT TAB IS HIGHLIGHTED NOT THE CONTACT TAB ..AND ALL
THE PAGE GET RELOADED AGAIN..HOW CAN
I FIX THIS?

my controller as below

def show_details

@sd_ticket = ServiceDeskTicket.find(params[:id])
@sd_attachments=@sd_ticket.service_desk_attachments.paginate :page =>
params[:page], :per_page => 15
@sd_contacts=@sd_ticket.contacts.paginate :page => params[:page],
:per_page => 20

end

In my view for contact (_view_sd_contact_details.rhtml) the pagination
portion is
<%= will_paginate @sd_contacts %>

Please help..
Sijo