SO fiddle

Test Fiddle mainly for SO Questions

by Nick Craver

HTML

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.4/themes/overcast/jquery-ui.css">
<div id="post-1383" class="post-1383">
<h2 class="entry-title">
  <a href="http://example.com/soul-music/">Soul Music</a>
</h2>
<span class="btn"></span> 
</div>

JavaScript

alert($('.btn').prev('h2').find('a').attr('href'));