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<div id="bgdvPassword" style="    position: absolute; top: 0px;  left: 0px;  width: 100%;  height: 100%;  background: #000;  opacity: 0.33;display:none"></div>
<div id="dvPassword" style="    position: absolute;   top: 30%;  left: 30%; width: 40%; height: 20%;   background: #fff;display:none">
    <div style="height:25px;  background: #f1f1f1;color:#000;font-size:20px;padding:5px 10px 5px 5px"> 请输入密码 </div>
    <div style="position: absolute;   top: 30px;  left: 10%;  width:80%; padding:40px  10px 5px 5px ">
        <input type="password" id="txtPwd" style="display: block;  height: 35px; width: 65%; background: #fff;  padding-left: 5px;  float: left;">
        <input type="button" id="bt" value="确定" style="    display: block;  height: 35px;  width: 25%;  background: #13b8f7;  padding-left: 5px;  border: 0px;    float: right;">
    </div>
</div>
<div onclick="ShowContents()">
    请点击这里锁屏
</div>
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 请输入密码 
    

        

        
    



    请点击这里锁屏

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window.onload = function() {
    if (document.cookie.indexOf('lock=1') != -1) {
        document.oncontextmenu = function() {
            alert("当前页面不能使用右键！");
            return false;
        }
        document.onkeydown = function() {
            if (window.event && window.event.keyCode == 123) {
                alert("F12被禁用");
                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 + "\n请使用Del键进行字符的删除操作！");
                window.event.returnValue = false;
            }
        }
        ShowContent(false);
    }
    //10s后锁定，修改delay为你需要的时间，单位毫秒
    var delay = 1 * 1000,
        timer;
    function startTimer() {
        clearTimeout(timer);
        timer = setTimeout(TimerHandler, delay);
    }
    function TimerHandler() {
        document.cookie = 'lock=1';
        //锁定后移除鼠标移动事件
        document.onmousemove = null;
        document.oncontextmenu = function() {
            alert("当前页面不能使用右键！");
            return false;
        }
        document.onkeydown = function() {
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