所有前面的答案都有一个始终活动的鼠标移动处理程序。如果处理程序是jQuery，那么jQuery执行的额外处理可以加起来。特别是当用户使用游戏鼠标时，每秒可能发生多达500个事件。

这个解决方案避免处理每一个鼠标移动事件。这导致一个小的时间误差，但你可以调整你的需要。

function setIdleTimeout(millis, onIdle, onUnidle) {
    var timeout = 0;
    startTimer();

    function startTimer() {
        timeout = setTimeout(onExpires, millis);
        document.addEventListener("mousemove", onActivity);
        document.addEventListener("keydown", onActivity);
        document.addEventListener("touchstart", onActivity);
    }
    
    function onExpires() {
        timeout = 0;
        onIdle();
    }

    function onActivity() {
        if (timeout) clearTimeout(timeout);
        else onUnidle();
        //since the mouse is moving, we turn off our event hooks for 1 second
        document.removeEventListener("mousemove", onActivity);
        document.removeEventListener("keydown", onActivity);
        document.removeEventListener("touchstart", onActivity);
        setTimeout(startTimer, 1000);
    }
}

http://jsfiddle.net/9exz43v2/

我使用这种方法，因为您不需要在事件触发时不断重置时间。相反，我们只记录时间，这将生成空闲的起始点。

function idle(WAIT_FOR_MINS, cb_isIdle) {
    var self = this,
        idle,
        ms = (WAIT_FOR_MINS || 1) * 60000,
        lastDigest = new Date(),
        watch;
    //document.onmousemove = digest;
    document.onkeypress = digest;
    document.onclick = digest;

    function digest() {
       lastDigest = new Date();
    }

    // 1000 milisec = 1 sec
    watch = setInterval(function() {
        if (new Date() - lastDigest > ms && cb_isIdel) {
            clearInterval(watch);
            cb_isIdle();
        }

    }, 1000*60);
},

使用普通JavaScript:

var inactivityTime = function () {
    var time;
    window.onload = resetTimer;
    // DOM Events
    document.onmousemove = resetTimer;
    document.onkeydown = resetTimer;

    function logout() {
        alert("You are now logged out.")
        //location.href = 'logout.html'
    }

    function resetTimer() {
        clearTimeout(time);
        time = setTimeout(logout, 3000)
        // 1000 milliseconds = 1 second
    }
};

并在需要的地方初始化函数(例如:onPageLoad)。

window.onload = function() {
  inactivityTime();
}

如果需要，您可以添加更多DOM事件。最常用的有:

document.onload = resetTimer;
document.onmousemove = resetTimer;
document.onmousedown = resetTimer; // touchscreen presses
document.ontouchstart = resetTimer;
document.onclick = resetTimer;     // touchpad clicks
document.onkeydown = resetTimer;   // onkeypress is deprectaed
document.addEventListener('scroll', resetTimer, true); // improved; see comments

或者使用数组注册所需的事件

window.addEventListener('load', resetTimer, true);
var events = ['mousedown', 'mousemove', 'keypress', 'scroll', 'touchstart'];
events.forEach(function(name) {
 document.addEventListener(name, resetTimer, true);
});

DOM事件列表:http://www.w3schools.com/jsref/dom_obj_event.asp

记得根据需要使用窗口或文档。下面你可以看到它们之间的区别:在JavaScript中，窗口、屏幕和文档之间的区别是什么?

代码更新了@frank-conijn和@daxchen改进:window。如果滚动是在可滚动元素内，Onscroll将不会触发，因为滚动事件不会冒泡。在窗口。addEventListener('scroll'， resetTimer, true)，第三个参数告诉侦听器在捕获阶段而不是冒泡阶段捕获事件。

对于其他有同样问题的用户。这是我刚编的一个函数。

它不会在用户每次鼠标移动时运行，也不会在每次鼠标移动时清除计时器。

<script>
// Timeout in seconds
var timeout = 10; // 10 seconds

// You don't have to change anything below this line, except maybe
// the alert('Welcome back!') :-)
// ----------------------------------------------------------------
var pos = '', prevpos = '', timer = 0, interval = timeout / 5 * 1000;
timeout = timeout * 1000 - interval;

function mouseHasMoved(e){
    document.onmousemove = null;
    prevpos = pos;
    pos = e.pageX + '+' + e.pageY;
    if(timer > timeout){
        timer = 0;
        alert('Welcome back!');
    }
}

setInterval(function(){
    if(pos == prevpos){
        timer += interval;
    }else{
        timer = 0;
        prevpos = pos;
    }
    document.onmousemove = function(e){
        mouseHasMoved(e);
    }
}, interval);
</script>

你可以用Underscore.js和jQuery更优雅地做到这一点:

$('body').on("click mousemove keyup", _.debounce(function(){
    // do preload here
}, 1200000)) // 20 minutes debounce

纯JavaScript，通过addEventListener正确设置重置时间和绑定:

(function() {

  var t,
    timeout = 5000;

  function resetTimer() {
    console.log("reset: " + new Date().toLocaleString());
    if (t) {
      window.clearTimeout(t);
    }
    t = window.setTimeout(logout, timeout);
  }

  function logout() {
    console.log("done: " + new Date().toLocaleString());
  }
  resetTimer();

  //And bind the events to call `resetTimer()`
  ["click", "mousemove", "keypress"].forEach(function(name) {
    console.log(name);
    document.addEventListener(name, resetTimer);
  });

}());