社会佳

注册随机表单

var user = document.getElementById('username');

var pwd = document.getElementById('password');

var yz = document.getElementById('yz');

var sjm = document.querySelector('textarea');

var box=document.querySelector('.box');

sui.onclick = function() {

//获取四位数值

var s = Math.floor(Math.random() * (9999 - 1000 + 1) + 1000);

console.log(s);

sjm.innerHTML = s;

if(sui.innerHTML == '获取随机码') {

//定义一个时间

var i = 59;

//执行

function time() {

sui.innerHTML = i + '秒后获取';

i--;

if(i < 0) {

clearInterval(time);

sui.innerHTML = '获取验证码';

}

}

//倒计时定时器

var times = setInterval(time, 1000)

}

btn.onclick = function() {

if(yz.value == s) {

alert('成功');

box.style.display='block';

} else {

alert('失败');

}

}

}

btn1.onclick = function() {

if(btn1.innerHTML == '刷新') {

user.value=null;

pwd.value=null;

yz.innerHTML=null;

sjm.innerHTML=null;

}

}