页面的head部分，需要设置好页面元素的样式，代码如下：

<style type="text/css">
* {
  box-sizing: border-box;
  transition: .25s ease-in-out;
}

html, body {
  background-color: #bcccd2;
}

#progressive-validation {
  width: 400px;
  margin: 100px auto 0 auto;
}
#progressive-validation input {
  display: block;
  border-radius: 5px;
  border: none;
  background: white;
  font-family: 'Microsoft YaHei','Lantinghei SC','Open Sans',Arial,'Hiragino Sans GB','STHeiti','WenQuanYi Micro Hei','SimSun',sans-serif;
  font-size: 16px;
  line-height: 16px;
  font-weight: 200;
  width: 100%;
  padding: 15px;
  margin: 0 0 10px 0;
  opacity: .2;
  outline: none;
  box-shadow: 0 0 0 1px transparent;
  background-image: url(images/valid.png);
  background-size: 0px 0px;
  background-position: right 23px;
  background-repeat: no-repeat;
}
#progressive-validation input[type="submit"], #progressive-validation input[type="submit"]:valid {
  background-color: #1a3e4c;
  color: white;
  background-image: none;
}
#progressive-validation input:focus {
  box-shadow: 0 0 0 1px #00aeef;
  opacity: 1 !important;
}
#progressive-validation input:enabled {
  opacity: .8;
}
#progressive-validation input:valid {
  background-image: url(images/valid.png);
  background-size: 32px 32px;
  background-position: right 10px center;
  background-repeat: no-repeat;
}
</style>

页面的body部分，多个input标签放置在一个form表单里，代码如下：

<form id="progressive-validation">
  <input type="text" id="field1" name="Name" placeholder="请输入姓名" required />  
  <input type="email" id="field2" name="Email" placeholder="请输入邮箱" required disabled />
  <input type="tel" pattern="[0-9]{10}" id="field3" name="Phone Number" placeholder="请输入手机号" required disabled/>
  <input type="submit" id="submit" value="请依次填写正确" disabled/>
</form>

页面的底部，需远程调用jQuery库，并引入一个本地JS文件，代码如下：

<script src='http://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js'></script>
<script type="text/javascript" src="js/index.js"></script>