JSF browser check

JSFBrowserCheck.jsf

       <c:when test="#{fn:containsIgnoreCase(request.getHeader('User-Agent'), 'MSIE 6') ||
                            fn:containsIgnoreCase(request.getHeader('User-Agent'), 'MSIE 7') ||
                            fn:containsIgnoreCase(request.getHeader('User-Agent'), 'MSIE 8') ||
                            fn:containsIgnoreCase(request.getHeader('User-Agent'), 'Firefox/3.2')}">

                <h:panelGrid columns="1" id="browserCheck">        

                    <h2>#{bundle.BrowserNotSupported} <br /></h2>
                    <strong>Browser Information: </strong>#{request.getHeader('User-Agent')}

                    <h:graphicImage library="img" name="img/JavaTopiary.png" />
                </h:panelGrid>
            </c:when>
            <c:otherwise>
              ....

       </c:when>