title: PrimeFaces Extension <pe:keyFilter> Javascript Error
body: <p>I am using <code>&lt;pe:KeyFilter/&gt;</code> , and, when I run my project in IE8, the following error is shown.</p>
  
  <p><strong>'b.browser.safari' is null or not an object&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;keyfilter.js.seam?ln=primefaces-extensions&amp;v=1.1.0, line 1 character 219</strong>. </p>
  
  <p>When I debug <strong>keyfilter.js</strong> file, error is show "<strong>d=b.browser.safari?e[d]||d:d</strong>" at that place.</p>
  
  <p>I already added</p>
  
  <ol>
  <li>primefaces-4.0.jar</li>
  <li>primefaces-extensions-1.1.0.jar</li>
  <li>commons-lang3-3.1.jar
  in my project.</li>
  </ol>
  
  <p>And I have already declared</p>
  
  <pre><code>&lt;context-param&gt;
      &lt;param-name&gt;org.primefaces.extensions.DELIVER_UNCOMPRESSED_RESOURCES&lt;/param-name&gt;
      &lt;param-value&gt;false&lt;/param-value&gt;
  &lt;/context-param&gt;
  </code></pre>
  
  <p>in web.xml.</p>
  
  <p>And in my xhtml page,
  xmlns:pe="http://primefaces.org/ui/extensions</p>
  
  <pre><code>&lt;p:inputText value="#{LoginFormBean.loginHeaderBean.day}" name="day" id="day"&gt;
      &lt;pe:keyFilter mask="num" /&gt; 
  &lt;/p:inputText&gt;
  </code></pre>
  
  <p>How can I solved this problem? Please give me suggestion. Thanks a lot.</p>