refresh or reload the Flex Application by Javascript

<mx:button label=''button" click="reload(event)"/>

<mx:scirpt>

</mx:script>

<![CDATA[

                  function reload(event:MouseEvent):void{

                      var ref:URLRequest = new URLRequest("javascript:location.relaod(true)");

                      navigateToURL(ref,"_self");

                  }

]]>

</mx:script>