title: The meaning of the ampersand
body: <p>In this line:</p>
  
  <pre><code>var dataString = 'name='+ name + '&amp;email=' + email + '&amp;subject=' + subject + '&amp;msg=' + msg;
  </code></pre>
  
  <p>What does the ampersand(<code>&amp;</code>) mean? </p>