Ruby on Rails : Show items per page in Ajax

In views.rhtml

<script language = "javascript">
function check(pagenum, totalpage){
 for(var i=0;i<=totalpage;i++){
  if(i==pagenum)  
  document.getElementById('page'+pagenum).style.border='1px solid #000000';
  else
  document.getElementById('page'+i).style.border='0px solid #000000';  
 }
} 
</script>

<%= javascript_include_tag "prototype" %>
<% 
@articles = Article.find(:all, :limit => 10) 
@allarticles = Article.find(:all) 
@total = @allarticles.length/10

for x in 0..@total
@num = x+1 
%>
<span id="page<%=x%>" onclick="check(<%=x%>,<%=@total%>)">
<%= link_to_remote @num, :url => { :action => "articles_per_page", :id => x },
 :update => "article_list" %>
</span>
<% end %>

<div id = 'article_list'>
<%= render :partial => 'article', :collection => @articles %>
</div>

In partial page, _article.rhtml

Title: <%= article.title %><br>
Author: <%= article.author %>
<hr>

In controller.rb

def articles_per_page
 @show = ((params[:id].to_i)*10)
 @articles = Article.find(:all, :offset => @show, :limit => 10)
 render :partial => 'article', :collection => @articles
end

** :offset, starting id to show per page
** :limit, limit data showing

Class Pagination : http://rails.rubyonrails.org/classes/ActionController/Pagination/Paginator/Page.html#M000158
Prototype Helper : http://api.rubyonrails.org/classes/ActionView/Helpers/PrototypeHelper.html#M001645
Other source : http://apidock.com/rails/ActionView/Helpers/PrototypeHelper/remote_form_for