1.创建一个registe.css文件，里面存放界面的设置，包含大小字体颜色等
* {
margin: 0;
padding: 0;
list-style-type: none;
}
.reg-content{
padding: 30px;
margin: 3px;
}
a, img {
border: 0;
}
body{
background-image: url("../imgs/R-C.jpg");
text-align: center;
}
table{
border-collapse: collapse;
border-spacing: 0;
}
td,th{
padding: 0;
height: 90px;
}
.inputs{
vertical-align: top;
}
.clear{
clear: both;
}
.clear:before,.clear after{
content: "";
display: table;
}
.clear:after{
claer:both;
}
.form-div {
background-color: rgba(255, 255, 255, 0.27);
border-radius: 10px;
border: 1px solid #aaa;
width: 424px;
margin-top: 150px;
margin-left:1050px;
padding: 30px 0 20px 0px;
font-size: 16px;
box-shadow: inset 0px 0px 10px rgba(255, 255, 255, 0.5), 0px 0px 15px rgba(75, 75, 75, 0.3);
text-align: left;
}
.form-div input[type="text"], .form-div input[type="password"], .form-div input[type="email"] {
width: 268px;
margin: 10px;
line-height: 20px;
font-size: 16px;
}
.form-div input[type="checkbox"] {
margin: 20px 0 20px 10px;
}
.form-div input[type="button"], .form-div input[type="submit"] {
margin: 10px 20px 0 0;
}
.form-div table {
margin: 0 auto;
text-align: right;
color: rgba(64, 64, 64, 1.00);
}
.form-div table img {
vertical-align: middle;
margin: 0 0 5px 0;
}
.footer {
color: rgba(64, 64, 64, 1.00);
font-size: 12px;
margin-top: 30px;
}
.form-div .buttons {
float: right;
}
input[type="text"], input[type="password"], input[type="email"] {
border-radius: 8px;
box-shadow: inset 0 2px 5px #eee;
padding: 10px;
border: 1px solid #D4D4D4;
color: #333333;
margin-top: 5px;
}
input[type="text"]:focus, input[type="password"]:focus, input[type="email"]:focus {
border: 1px solid #50afeb;
outline: none;
}
input[type="button"], input[type="submit"] {
padding: 7px 15px;
background-color: #3c6db0;
text-align: center;
border-radius: 5px;
overflow: hidden;
min-width: 80px;
border: none;
color: #FFF;
box-shadow: 1px 1px 1px rgba(75, 75, 75, 0.3);
}
input[type="button"]:hover, input[type="submit"]:hover {
background-color: #5a88c8;
}
input[type="button"]:active, input[type="submit"]:active {
background-color: #5a88c8;
}
.err_msg{
color: red;
padding-right: 170px;
}
#password_err,#tel_err{
padding-right: 195px;
}
#reg_btn{
margin-right:50px; width: 285px; height: 45px; margin-top:20px;
}
2.创建一个html文件，存放对用户名密码手机号的验证信息
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>欢迎注册</title>
<link rel="stylesheet" href="../css/register.css">
</head>
<body>
<div class="form-div">
<div class="reg-content">
<h1>欢迎注册</h1>
<span>已有帐号？</span> <a href="#">登录</a>
</div>
<form id="reg-form" action="#" method="get">
<table>
<tr>
<td>用户名</td>
<td class="inputs">
<input name="username" type="text" id="username">
<br>
<span id="username_err" class="err_msg" style="display: none">用户名不符合要求</span>
</td>
</tr>
<tr>
<td>密码</td>
<td class="inputs">
<input name="password" type="password" id="password">
<br>
<span id="password_err" class="err_msg" style="display: none">密码格式有误</span>
</td>
</tr>
<tr>
<td>手机号</td>
<td class="inputs"><input name="tel" type="text" id="tel">
<br>
<span id="tel_err" class="err_msg" style="display: none">手机号格式有误</span>
</td>
</tr>
</table>
<div class="buttons">
<input value="注 册" type="submit" id="reg_btn">
</div>
<br class="clear">
</form>
</div>
<script>
//验证用户名是否符合规则
//1.获取用户名的输入框
var usernameInput = document.getElementById("username");
//2.绑定onblur事件，失去焦点
usernameInput.onblur = checkUsername;
function checkUsername(){
//1.3获取用户输入的用户名
var username = usernameInput.value.trim();//trim可以排除空白字符
//1.4判断用户名是否符合规则：长度6~12单词字符组成，正则表达式
var reg = /^\w{6,12}$/;
var flag =reg.test(username);
//var flag = username.length >= 6 && username.length <= 12;
if (flag) {
//符合规则
document.getElementById("username_err").style.display = 'none';
} else {
//不合符规则
document.getElementById("username_err").style.display = '';
}
return flag;
}
//验证密码是否符合规则
//1.获取密码的输入框
var passwordInput = document.getElementById("password");
//2.绑定onblur事件，失去焦点
passwordInput.onblur = checkPassword;
function checkPassword(){
//1.3获取用户输入的密码
var password = passwordInput.value.trim();//trim可以排除空白字符
//1.4判断密码是否符合规则：长度6~12单词字符组成
var reg = /^\w{6,12}$/;
var flag =reg.test(password);
//var flag = password.length >= 6 && password.length <= 12;
if (flag) {
//符合规则
document.getElementById("password_err").style.display = 'none';
} else {
//不合符规则
document.getElementById("password_err").style.display = '';
}
return flag;
}
//1. 验证手机号是否符合规则
//1.1 获取手机号的输入框
var telInput = document.getElementById("tel");
//1.2 绑定onblur事件 失去焦点
telInput.onblur = checkTel;
function checkTel() {
//1.3 获取用户输入的手机号
var tel = telInput.value.trim();
//1.4 判断手机号是否符合规则：长度 11，数字组成，第一位是1
//var flag = tel.length == 11;
var reg = /^[1]\d{10}$/;
var flag = reg.test(tel);
if (flag) {
//符合规则
document.getElementById("tel_err").style.display = 'none';
} else {
//不合符规则
document.getElementById("tel_err").style.display = '';
}
return flag;
}
//1. 获取表单对象
var regForm = document.getElementById("reg-form");
//2. 绑定onsubmit 事件
regForm.onsubmit = function () {
//挨个判断每一个表单项是否都符合要求，如果有一个不合符，则返回false
var flag = checkUsername() && checkPassword() && checkTel();
return flag;
}
</script>
</body>
</html>注意：register.css和html文件的存放位置，以及需要在imgs内放入背景图片
