手机验证码60s等待

html:

<div class="input">    <input class="tel input_all" type="text" name="tel" placeholder="手机号"></div><div class="input huoqu">    <input class="yzm input_all" type="text" name="code" placeholder="验证码">    <button class="btn1">获取验证码</button></div><span class="error"></span>

JavaScript:

var btn1 = document.querySelector('.btn1');var tel = document.querySelector('.tel');var error = document.querySelector('.error');var time = 60;btn1.onclick = function(){    var name = tel.value;        if (name == "") {        error.innerHTML='手机号不能为空!';        return;    }     else {        if (!(/^1[3|4|5|7|8]\d{9}$/.test(name))) {            error.innerHTML='手机号格式有误.';             return;        }    }    var timer = setInterval(function(){                time--;        btn1.innerHTML = time + "秒";        btn1.disabled = true;        if (time==0) {            time = 60;            clearInterval(timer);             btn1.innerHTML = "获取验证码";            btn1.disabled = false;        }    },1000);}