在线考试防作弊js代码
<html>
<head>
<script src="https://cdn.bootcss.com/jquery/3.4.1/jquery.js"></script>
</head>
<body>测试内容<input></input></body>
<script type="text/javascript">
//禁用复制粘贴F5及Backspace
document.onkeydown=function(){
//禁用Ctrl+C
if(event.ctrlKey && event.keyCode==67){return false;}
//禁用Ctrl+V
if(event.ctrlKey && event.keyCode==86){return false;}
//禁用F5
if(event.keyCode==116){return false;}
//当焦点位置为非文本框时，禁用BackSpace
//IE下不兼容window.event.target，使用srcElement代替
if(event.keyCode==8){
var ev=window.event;
var obj=ev.srcElement;
if(obj.getAttribute('type')!='text'&& obj.getAttribute('type')!='textarea'){return false;}
}
}
</script>
<script type="text/javascript">
//屏蔽右击
document.body.oncontextmenu=document.body.ondragstart=document.body.onselectstart=document.body.onbeforecopy=function(){return false;};
//屏蔽复制粘贴
document.body.oncopy=document.body.oncut=function(){return false;};
var blurNum=1;
$(window).on('blur resize',function(){
if(blurNum>3){
alert("你已经违规3次考试结束！");
$(window).off("beforeunload");
CloseWebPage();
}else{
alert("考试中切换窗口违规"+blurNum+"次！");
}
blurNum++;
});
$(window).on('beforeunload', function(){
$(this).off('blur resize');
return '离开此页面将退出考试!';
});
//关闭窗口方法
function CloseWebPage(){
if (navigator.userAgent.indexOf("MSIE") > 0) {
if (navigator.userAgent.indexOf("MSIE 6.0") > 0) {
window.opener = null;
window.close();
} else {
window.open('', '_top');
window.top.close();
}
}
else if (navigator.userAgent.indexOf("Firefox") > 0) {
window.location.href = 'about:blank ';
} else {
window.opener = null;
window.open('', '_self', '');
window.location.href = "about:blank";
window.close();
}
}
</script>
</html>
