屏蔽F1~F12的快捷键的js函数

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我是靠谱客的博主高贵河马，最近开发中收集的这篇文章主要介绍屏蔽F1~F12的快捷键的js函数，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

复制代码代码如下:

 
function window.onhelp(){return false} //屏蔽F1帮助 
/*keyCod从113-123分别禁用了F2-F12键,13禁用了回车键(Enter),8禁用了退格键(BackSpace)*/ 

document.onkeydown = function(){ 
if(window.event && window.event.keyCode == 113) { 
window.event.keyCode = 505; 
} 
if(window.event && window.event.keyCode == 114) { 
window.event.keyCode = 505; 
} 
if(window.event && window.event.keyCode == 115) { 
window.event.keyCode = 505; 
} 
if(window.event && window.event.keyCode == 116) { 
window.event.keyCode = 505; 
} 
if(window.event && window.event.keyCode == 117) { 
window.event.keyCode = 505; 
} 
if(window.event && window.event.keyCode == 118) { 
window.event.keyCode = 505; 
} 
if(window.event && window.event.keyCode == 119) { 
window.event.keyCode = 505; 
} 
if(window.event && window.event.keyCode == 120) { 
window.event.keyCode = 505; 
} 
if(window.event && window.event.keyCode == 121) { 
window.event.keyCode = 505; 
} 
if(window.event && window.event.keyCode == 122) { 
window.event.keyCode = 505; 
} 
if(window.event && window.event.keyCode == 123) { 
window.event.keyCode = 505; 
} 
if(window.event && window.event.keyCode == 13) { 
window.event.keyCode = 505; 
} 
if(window.event && window.event.keyCode == 8) { 
alert(str+"n请使用Del键进行字符的删除操作！"); 
window.event.returnValue=false; 
} 
if(window.event && window.event.keyCode == 505){ 
　　alert(str) 
window.event.returnValue=false; 
} 
} 