屏蔽鼠标右键、Ctrl+N、Shift+F10、Alt+F4、F11、F5刷新、退格键

<html> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312"> 
<noscript><meta http-equiv="refresh" content="0;url=about:noscript"></noscript> 
<title>屏蔽鼠标右键、Ctrl+N、Shift+F10、Alt+F4、F11、F5刷新、退格键</title> 
</head> 
<body> 
<script> 
//屏蔽鼠标右键、Ctrl+N、Shift+F10、F11、F5刷新、退格键 
function document.oncontextmenu(){event.returnValue=false;}//屏蔽鼠标右键 
function window.onhelp(){return false} //屏蔽F1帮助 
function document.onkeydown(){ 
if((window.event.altKey)&& 
((window.event.keyCode==37)|| //屏蔽Alt+方向键← 
(window.event.keyCode==39))){ //屏蔽Alt+方向键→ 
alert("不准你使用ALT+方向键前进或后退网页！"); 
event.returnValue=false; 
} if((event.keyCode==8)|| //屏蔽退格删除键 
(event.keyCode==116)|| //屏蔽F5刷新键 
(event.ctrlKey && event.keyCode==82)){ //Ctrl+R 
event.keyCode=0; 
event.returnValue=false; 
} 
if(event.keyCode==122){event.keyCode=0;event.returnValue=false;} //屏蔽F11 
if(event.ctrlKey && event.keyCode==78)event.returnValue=false; //屏蔽Ctrl+n 
if(event.shiftKey && event.keyCode==121)event.returnValue=false; //屏蔽shift+F10 
if(window.event.srcElement.tagName=="A" && window.event.shiftKey) 
window.event.returnValue=false; //屏蔽shift加鼠标左键新开一网页 
if((window.event.altKey)&&(window.event.keyCode==115)){ //屏蔽Alt+F4 
window.showModelessDialog("about:blank","","dialogWidth:1px;dialogheight:1px"); 
return false; 
} 
} 
</ script> 
屏蔽鼠标右键、Ctrl+N、Shift+F10、Alt+F4、F11、F5刷新、退格键 
</body> 
</html>

[Ctrl+A 全选注:如需引入外部Js需刷新才能执行]

屏蔽鼠标右键、Ctrl+N、Shift+F10、Alt+F4、F11、F5刷新、退格键_javascript技巧