title: Onclick causes Server Connection Reset in Joomla 3.3.6
body: <p>I have been developing a Joomla website locally on MAMP 3.2x and just yesterday I migrated it to the clients server. It is running CentOS 6.5 with Apache 2.2.xx (standard CentOS Package). I have installed php5.5 &amp; php5.5-fpm, along with MySQL etc. </p>
  
  <p>The site is working absolutely fine, except for 1 little issue, which I have narrowed down to the word "Onclick" </p>
  
  <p>If any article or module or content, somewhere includes the word "onclick", as soon as I click Save, Save Close, Cancel, etc, I get a Server Dropped Connection Error. </p>
  
  <p>The weird thing is if its "Onclic" or "Onclik" or anyother variation, then its fine. But somehow "onclick" causes it to fail. </p>
  
  <ul>
  <li>Its not a POST Size issue, just a simple line will do it.  </li>
  <li>I have tried
  Chrome, Safari and Firefox.  </li>
  <li>I have checked my server logs, Apache,
  FPM &amp; MySql. No errors pertaining to this</li>
  <li>Also tried disabling fpm and switching to default php</li>
  <li>switched to php 5.6 but still the same issue</li>
  </ul>
  
  <p>The only clue I have is this</p>
  
  <p><code>POST http://example.com/administrator/index.php?option=com_content&amp;layout=edit&amp;id=224 net::ERR_CONNECTION_RESET core.js:1 
   Joomla.submitform -&gt; core.js:1
   Joomla.submitbutton-&gt; index.php?option=com_content&amp;view=article&amp;layout=edit&amp;id=224:534 
   onclick-&gt; index.php?option=com_content&amp;view=article&amp;layout=edit&amp;id=224:502</code></p>
  
  <p>--Update--
  The issue only happens if onclick is part of a html tag. It seems the HTML filtering portion of Joomla is the culprit, even though its set to No Filtering for SuperAdmins</p>
  
  <p>the bare minimujm text required for this issue to show up is</p>
  
  <pre><code>&lt; onclick= &gt;
  </code></pre>
  
  <p>The following variations are fine</p>
  
  <pre><code>&lt; onclick
  &lt; onclick=
  &lt; onclick &gt;
  </code></pre>
  
  <p>Help please!!</p>