JavaScript实现点击切换验证码及校验

时间:2021-01-10 栋栋很优秀啊人气:0

这篇文章主要为大家详细介绍了JavaScript实现点击切换验证码及校验，文中示例代码介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们可以参考一下

效果：

代码：

<!DOCTYPE html>
<html>

<head>
 <meta charset="UTF-8">
 <title></title>
 <style>
 div {
 width: 100px;
 height: 40px;
 background-color: red;
 color: #fff;
 text-align: center;
 line-height: 40px;
 font-size: 30px;
 font-weight: 900;
 user-select: none;
 }

 .show {
 position: absolute;
 left: 0;
 top: 0;
 right: 0;
 bottom: 0;
 margin: auto;
 width: 200px;
 height: 100px;
 background-color: pink;
 text-align: center;
 line-height: 100px;
 font-size: 40px;
 font-weight: 900;
 display: none;
 }
 </style>
</head>

<body>

 <div></div>
 <input type="text" value="请输入上图的验证码" />
 <button>注册</button>
 <div class="show">等待中。。。。</div>
 <script type="text/javascript">

 //1000-9999
 var div = document.getElementsByTagName("div");
 var inp = document.getElementsByTagName("input")[0];
 var btn = document.getElementsByTagName("button")[0];
 div[0].innerHTML = ranFun(1000, 9999);

 inp.onclick = function () {
 this.value = ""
 }

 div[0].onclick = function () {
 this.innerHTML = ranFun(1000, 9999)
 }

 btn.onclick = function () {
 if (inp.value == div[0].innerHTML) {
 div[1].style.display = "block";
 setTimeout(function () {
  location.href = "register.html"
 }, 3000)
 } else {
 alert('验证码错误')
 div[0].innerHTML = ranFun(1000, 9999);
 inp.value = ""
 }
 }



 function ranFun(a, b) {
 return Math.floor(Math.random() * (b - a + 1) + a)
 }
 </script>
</body>

</html>

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