禁止F5和菜单 刷新

禁止F5和菜单 刷新
[code=HTML]
<script type="text/javascript">

     function document.onkeydown()  
          {if(event.keyCode==116)  
                      {event.keyCode=0  
                          event.returnValue=false;  
                      }  
          }  
   
          document.οncοntextmenu=function(){return   false}    

</script>
[/code]