title: What does href expression <a href="javascript:;"></a> do?
body: <p>I have seen the following href used in webpages from time to time.  However, I don't understand what this is trying to do or the technique.  Can someone elaborate please?</p>
  
  <pre><code>&lt;a href="javascript:;"&gt;&lt;/a&gt;
  </code></pre>