title: Jquery: create pager(next - prev button) for new data
body: <p>I am using ajax to load more posts. For example.</p>
  
  <p>I already have post like:</p>
  
  <pre><code> &lt;div class='post'&gt;post1&lt;/div&gt;
   &lt;div class='post'&gt;post2&lt;/div&gt;
   &lt;div class='post'&gt;post3&lt;/div&gt;
  </code></pre>
  
  <p>After press <code>Next Posts</code> button I receive new data:</p>
  
  <pre><code> &lt;div class='post'&gt;post1&lt;/div&gt;
   &lt;div class='post'&gt;post2&lt;/div&gt;
   &lt;div class='post'&gt;post3&lt;/div&gt;
   &lt;div class='post'&gt;post4&lt;/div&gt;
   &lt;div class='post'&gt;post5&lt;/div&gt;
   &lt;div class='post'&gt;post6&lt;/div&gt;
  </code></pre>
  
  <p>But I only want new data appeared and the old data is hidden.</p>
  
  <p>It means i can back old posts by <code>Prev Posts</code> Button. How can I use Jquery to do that? </p>
  
  <p>Thank for your help. </p>