JS 禁止浏览器右键菜单和刷新

 1 <script language="javascript">
 2 //禁止按键F5
 3 document.onkeydown = function(e){
 4     e = window.event || e;
 5     var keycode = e.keyCode || e.which;
 6     if( keycode = 116){
 7         if(window.event){// ie
 8             try{e.keyCode = 0;}catch(e){}
 9             e.returnValue = false;
10         }else{// ff
11             e.preventDefault();
12         }
13     }
14 }
15 
16 //禁止鼠标右键菜单
17 document.oncontextmenu = function(e){
18          return false;
19 }
20 </script>