title: Is restriction using input maxlength sufficient enough?
body: <p>Is it sufficient to restrict user input value by setting <code>maxlength</code> only? Lets say I have this code:</p>
  
  <pre><code>    &lt;input type="text" id="foo" maxlength="12"&gt;
  </code></pre>
  
  <p>Is there any possibility that user still can (in any valid or invalid way) insert value more than <code>12</code>?</p>
  
  <p>When we have set the <code>maxlength</code>, is it <strong>usefull</strong> or <strong>useless</strong> to validate it once again using javascript or maybe at the backend (servlet, etc)?</p>