在javascript中重置倒计时

我想在用户每次在输入运行重置倒计时中键入后，添加

clearTimeout

，但它不起作用。我该怎么办？（请帮我输入代码，我不需要新代码。）

演示：

Html:

---

设置超时后，您正在清除超时。试试这个：

var myTimeout = null;

$('#MizMah').live('keyup', function () {
    function render(n) {
        var digits = [],
            r;
        do {
            r = n % 10;
            n = (n - r) / 10;
            digits.unshift([r].join(''));
        } while (n > 0);
        $('#Seconds').html(digits.join(''));
    }

    (function timer(current) {
        render(current);
        if (current > 0) {
            clearTimeout(myTimeout);
            myTimeout = setTimeout(function () {
                timer(current - 1);
            }, 1100);
        }
    }(5));

})

$('#MizMah').live('keyup', function () {
    function render(n) {
        var digits = [],
            r;
        do {
            r = n % 10;
            n = (n - r) / 10;
            digits.unshift([r].join(''));
        } while (n > 0);
        $('#Seconds').html(digits.join(''));
    }

    (function timer(current) {
        render(current);
        if (current > 0) {
            myTimeout = setTimeout(function () {
                timer(current - 1);
            }, 1100);
            clearTimeout(myTimeout);
        }
    }(5));
})​

var myTimeout = null;

$('#MizMah').live('keyup', function () {
    function render(n) {
        var digits = [],
            r;
        do {
            r = n % 10;
            n = (n - r) / 10;
            digits.unshift([r].join(''));
        } while (n > 0);
        $('#Seconds').html(digits.join(''));
    }

    (function timer(current) {
        render(current);
        if (current > 0) {
            clearTimeout(myTimeout);
            myTimeout = setTimeout(function () {
                timer(current - 1);
            }, 1100);
        }
    }(5));

})