js锁屏用代码



     请输入密码 
    
        

        
    



    请点击这里锁屏

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() {

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);
    }

function ShowContent(show) {
        // document.getElementById('dvContent').style.display = show ? 'block' : 'none';
        document.getElementById('dvPassword').style.display = show ? 'none' : 'block';
        document.getElementById('bgdvPassword').style.display = show ? 'none' : 'block';
    }

function check() {
        if (document.getElementById('txtPwd').value == '123') {
            document.cookie = 'lock=0';

ShowContent(true);
            startTimer() //重新计时
            document.oncontextmenu = null
            document.onkeydown = null

} else {
            alert('密码不正确');
        }
    }

document.onmousemove = startTimer;
    var obt = document.getElementById("bt");
    obt.onclick = function() {
        check();
    }
    startTimer();
}

function ShowContents() {
    document.cookie = 'lock=1';
    //锁定后移除鼠标移动事件
    document.oncontextmenu = function() {
        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;
        }

}
    // document.getElementById('dvContent').style.display = show ? 'block' : 'none';
    document.getElementById('dvPassword').style.display = 'block';
    document.getElementById('bgdvPassword').style.display = 'block';
}

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