<script language="javascript">

 //禁止按键F5

 document.onkeydown = function(e){

     e = window.event || e;

     var keycode = e.keyCode || e.which;

     if( keycode = 116){

         if(window.event){// ie

             try{e.keyCode = 0;}catch(e){}

             e.returnValue = false;

         }else{// ff

             e.preventDefault();

         }

     }

 }

 //禁止鼠标右键菜单

 document.oncontextmenu = function(e){

          return false;

 }

 </script>