代码屏蔽网页中的各种按键

china0396

1. <script>
   
2. //屏蔽鼠标右键Ctrl+N、Shift+F10、F11、F5刷新、退格键
   
3. function document.oncontextmenu(){event.returnValue=false;}
   
4. //屏蔽鼠标右键
   
5. function window.onhelp(){return false}
   
6. //屏蔽F1帮助
   
7. function document.onkeydown(){ if((window.event.altKey)&& ((window.event.keyCode==37)||
   
8. //屏蔽Alt+方向键←
   
9. (window.event.keyCode==39))){
   
10. //屏蔽Alt+方向键→
    
11. alert("不准你使用ALT+方向键前进或后退网页！"); event.returnValue=false; } if((event.keyCode==8)||
    
12. //屏蔽退格删除键
    
13. (event.keyCode==116)||
    
14. //屏蔽F5刷新键
    
15. (event.ctrlKey && event.keyCode==82)){
    
16. //Ctrl+R
    
17. event.keyCode=0;event.returnValue=false;}if(event.keyCode==122){event.keyCode=0;event.returnValue=false;}
    
18. //屏蔽F11
    
19. if(event.ctrlKey && event.keyCode==78)event.returnValue=false;
    
20. //屏蔽Ctrl+n
    
21. if(event.shiftKey && event.keyCode==121)event.returnValue=false;
    
22. //屏蔽shift+F10
    
23. if(window.event.srcElement.tagName=="A" && window.event.shiftKey) window.event.returnValue=false;
    
24. //屏蔽shift加鼠标左键新开一网页
    
25. if((window.event.altKey)&&(window.event.keyCode==115))}
    
26. //屏蔽Alt+F4
    
27. window.showModelessDialog("about:blank","","dialogWidth:1px;dialogheight:1px"); return false; }}
    
28. </script>

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