屏蔽鼠标右键/F1帮助

<script type="text/javascript" language="JavaScript">
      try{
        self.moveTo(0,0)
        self.resizeTo(screen.availWidth,screen.availHeight)
        function document.oncontextmenu(){event.returnValue=false;}//屏蔽鼠标右键
        document.onselectstart=new Function("event.returnValue=false");
        function window.onhelp(){return false} //屏蔽F1帮助 
        }catch(e)
        {}
    </script>