<!-- dom --><input id="send" type="button" value="发送验证码">

// 原生js版本var times = 60, // 临时设为60秒    timer = null;document.getElementById('send').onclick = function () {    // 计时开始    timer = setInterval(function () {        times--;        if (times <= 0) {            send.value = '发送验证码';            clearInterval(timer);            send.disabled = false;            times = 60;        } else {            send.value = times + '秒后重试';            send.disabled = true;        }    }, 1000);}

// jQuery版本var times = 60,    timer = null;$('#send').on('click', function () {    var $this = $(this);    // 计时开始    timer = setInterval(function () {        times--;        if (times <= 0) {            $this.val('发送验证码');            clearInterval(timer);            $this.attr('disabled', false);            times = 60;        } else {            $this.val(times + '秒后重试');            $this.attr('disabled', true);        }    }, 1000);});

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