How to refresh a page in Adobe Flex?

In the following code the navigateToURL property is navigating to the same page which creates the refreshing of the page.

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" minWidth="1024" applicationComplete="init()" minHeight="768">
     <mx:Script>
      <![CDATA[
      	import flash.net.navigateToURL;
      	import mx.controls.Alert;
        private function init():void
        {
        }
        protected function button1_clickHandler(event:MouseEvent):void
        {
                navigateToURL(new URLRequest("javascript:location.reload(true)"), "_self");
                var urlRequest:URLRequest = new URLRequest(Application.application.url);
				navigateToURL(urlRequest,"_self");
        }
      ]]>
   </mx:Script>
<mx:Button x="187" y="101" label="Button" click="button1_clickHandler(event)"/>
</mx:Application>