title: When should I use return false in jquery function?
body: <p>I found lots of functions like this one:</p>
  
  <pre><code>$(function() {
      $("body a").click(function() {
          alert(this.innerHTML);
          return false;
      });
  });
  </code></pre>
  
  <p>What's the difference between <code>this</code> and <code>$(this)</code> in jquery?</p>
  
  <p>They all have a line <code>return false;</code> - I don't know when I should  use <code>return false</code> in jquery function and don't know what's the use of it?</p>