屏蔽F12审查元素，禁止使用右键菜单

一、屏蔽F12审查元素

<script type="text/javascript">
            document.onkeydown = function() {
                if(window.event && window.event.keyCode == 123) {
                    alert("请尊重版权！");
                    event.keyCode = 0;
                    event.returnValue = false;
                }
                if(window.event && window.event.keyCode == 13) {
                    window.event.keyCode = 505;
                }
                if(window.event && window.event.keyCode == 8) {
                    alert(str + "
请使用Del键进行字符的删除操作！");
                    window.event.returnValue = false;
                }

            }
            
        </script>

二、禁用右键菜单

<body ondragstart="window.event.returnValue=false" oncontextmenu="window.event.returnValue=false" onselectstart="event.returnValue=false"></body>

三、屏蔽粘贴

document.onpaste = function (event){
if(window.event){
event = window.event;
}try{
var the = event.srcElement;
if (!((the.tagName == "INPUT" && the.type.toLowerCase() == "text") || the.tagName == "TEXTAREA")){
return false;
}
return true;
}catch (e){
return false;
}
}

四、屏蔽复制

document.oncopy = function (event){
if(window.event){
event = window.event;
}try{
var the = event.srcElement;
if(!((the.tagName == "INPUT" && the.type.toLowerCase() == "text") || the.tagName == "TEXTAREA")){
return false;
}
return true;
}catch (e){
return false;
}
}

五、屏蔽剪切

document.oncut = function (event){
if(window.event){
event = window.event;
}try{
var the = event.srcElement;
if(!((the.tagName == "INPUT" && the.type.toLowerCase() == "text") || the.tagName == "TEXTAREA")){
return false;
}
return true;
}catch (e){
return false;
}
}

六、屏蔽选中

document.onselectstart = function (event){
if(window.event){
event = window.event;
}try{
var the = event.srcElement;
if (!((the.tagName == "INPUT" && the.type.toLowerCase() == "text") || the.tagName == "TEXTAREA")){
return false;
}
return true;
} catch (e) {
return false;
}
}

（本文转自博客园的 Clark_Kent ，博客原文：https://www.cnblogs.com/HenryCZH/p/5867833.html 感谢经验分享！）