title: Joomla 2.5.28. Error 500 JHtml: :behavior not supported. File not found
body: <p>I'm using a search component (Offlajn Universal AJAX live search) in my Joomla 2.5.28 site. When searching for a word, I get the error:</p>
  
  <pre><code>Error 500 JHtml: :behavior not supported. File not found.
  </code></pre>
  
  <p>This is the info I get from debugging.</p>
  
  <pre><code>Call stack
  #   Function    Location
  1   JSite-&gt;dispatch()   /home/mysite/public_html/index.php:42
  2   JComponentHelper::renderComponent() /home/mysite/public_html/includes/application.php:194
  3   JComponentHelper::executeComponent()    /home/mysite/public_html/libraries/joomla/application/component/helper.php:348
  4   require_once()  /home/mysite/public_html/libraries/joomla/application/component/helper.php:380
  5   JController-&gt;execute()  /home/mysite/public_html/components/com_search/search.php:15
  6   SearchController-&gt;display() /home/mysite/public_html/libraries/joomla/application/component/controller.php:761
  7   JController-&gt;display()  /home/mysite/public_html/components/com_search/controller.php:33
  8   SearchViewSearch-&gt;display() /home/mysite/public_html/libraries/joomla/application/component/controller.php:722
  9   JView-&gt;display()    /home/mysite/public_html/components/com_search/views/search/view.html.php:195
  10  JView-&gt;loadTemplate()   /home/mysite/public_html/plugins/system/t3/includes/joomla25/view.php:205
  11  include()   /home/mysite/public_html/plugins/system/t3/includes/joomla25/view.php:649
  12  JHtml::_()  /home/mysite/public_html/plugins/system/t3/base-bs3/html/com_search/search/default.php:11
  13  JError::raiseError()    /home/mysite/public_html/libraries/joomla/html/html.php:123
  14  JError::raise() /home/mysite/public_html/libraries/joomla/error/error.php:251
  15  JError::throwError()    /home/mysite/public_html/libraries/joomla/error/error.php:176
  16  call_user_func_array()  /home/mysite/public_html/libraries/joomla/error/error.php:214
  17  JError::handleCallback()     
  18  call_user_func()    /home/mysite/public_html/libraries/joomla/error/error.php:765
  19  plgSystemReDJ::customError()    
  </code></pre>
  
  <p>If I try going back home and search again, I sometimes get it right (no error). </p>
  
  <p>Can someone help with this?</p>
  
  <p>I tried searching <a href="https://stackoverflow.com/questions/13891599/error-500-on-joomla-2-5-8-jhtml-jquery-not-supported-file-not-found">another question</a> but it doesn't seem like mine.</p>
  
  <p>Thanks in advance!</p>