原生js验证简洁注册登录页面

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序

一个以js验证表单的简洁的注册登录页面，不多说直接上图

效果

主要文件

完整代码

1 sign_up.html 注册表单

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title>sign-up</title>
 <link rel="stylesheet" href="css/common_form.css">
</head>
<body>
 <header>
 <div class="header-line"></div>
 </header>
 <div class="content">
 <img class="content-logo" src="img/form_logo.png" alt="logo">
 <h1 class="content-title">创建账户</h1>
 <div class="content-form">
 <form method="post" action="" onsubmit="return submitTest()">
 <div id="change_margin_1">
  <input class="user" type="text" name="user" placeholder="请输入用户名" onblur="oBlur_1()" onfocus="oFocus_1()">
 </div>
 <!-- input的value为空时弹出提醒 -->
 <p id="remind_1"></p>
 <div id="change_margin_2">
  <input class="password" type="password" name="password" placeholder="请输入密码" onblur="oBlur_2()" onfocus="oFocus_2()">
 </div>
 <!-- input的value为空时弹出提醒 -->
 <p id="remind_2"></p>
 <div id="change_margin_3">
  <input class="content-form-signup" type="submit" value="创建账户">
 </div>
 </form>
 </div>
 <div class="content-login-description">已经拥有账户？</div>
 <div><a class="content-login-link" href="log_in.html">登录</a></div>
 </div>
<script src="js/common_form_test.js"></script>
</body>
</html>

2 log_in.html 登录表单

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title>log-in</title>
 <link rel="stylesheet" href="css/common_form.css">
</head>
<body>
 <header>
 <div class="header-line"></div>
 </header>
 <div class="content">
 <img class="content-logo" src="img/form_logo.png" alt="logo">
 <h1 class="content-title">登录</h1>
 <div class="content-form">
 <form method="post" action="" onsubmit="return submitTest()">
 <div id="change_margin_1">
  <input class="user" type="text" name="user" placeholder="请输入用户名" onblur="oBlur_1()" onfocus="oFocus_1()">
 </div>
 <!-- input的value为空时弹出提醒 -->
 <p id="remind_1"></p>
 <div id="change_margin_2">
  <input class="password" type="password" name="password" placeholder="请输入密码" onblur="oBlur_2()" onfocus="oFocus_2()">
 </div>
 <!-- input的value为空时弹出提醒 -->
 <p id="remind_2"></p>
 <div id="change_margin_3">
  <input class="content-form-signup" type="submit" value="登录">
 </div>
 </form>
 </div>
 <div class="content-login-description">没有账户？</div>
 <div><a class="content-login-link" href="sign_up.html">注册</a></div>
 </div>
<script src="js/common_form_test.js"></script>
</body>
</html>

3 common_form.css 表单css样式

/*重置样式*/
html, body, div, span, applet, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre, a, abbr,
acronym, address, big, cite, code, del, dfn, em, img, ins, kbd, q, s, samp, small, strike, strong, sub
, sup, tt, var, b, u, i, dl, dt, dd, ol, ul, li, fieldset, form, label, legend, table, caption, tbody,
tfoot, thead, tr, th, td, article, aside, canvas, details, embed, figure, figcaption, footer, header,
hgroup, menu, nav, output, section, summary, time, mark, audio, video {
 margin: 0;
 padding: 0;
 border: 0
}
body {
 font-family: "微软雅黑";
 background: #f4f4f4;
}

/*header*/
.header-line {
 width: 100%;
 height: 4px;
 background: #0dbfdd;
}

/*content*/
.content {
 width: 28%;
 margin: 70px auto 0;
 text-align: center;
}
.content-logo {
 width: 80px;
 height: 80px;
}
.content-title {
 margin: 10px 0 25px 0;
 font-size: 2em;
 color: #747474;
 font-weight: normal;
}
.content-form {
 width: 100%;
 padding: 36px 0 20px;
 border: 1px solid #dedede;
 text-align: center;
 background: #fff;
}
.content-form form div {
 margin-bottom: 19px;
}
.content-form form .user,
.content-form form .password {
 width: 77%;
 height: 20px;
 padding: 10px;
 font-size: 1em;
 border: 1px solid #cccbcb;
 border-radius: 7px;
 letter-spacing: 1px;
}
.content-form form input:focus {
 outline: none;
 -webkit-box-shadow: 0 0 5px #0dbfdd;
 box-shadow: 0 0 5px #0dbfdd;
}
.content-form-signup {
 width: 84%;
 margin: 0 auto;
 padding: 10px;
 border: 1px solid #cccbcb;
 border-radius: 7px;
 font-size: 1em;
 font-weight: bold;
 color: #fff;
 background: #0dbfdd;
 cursor: pointer;
}
.content-form-signup:hover {
 background: #0cb3d0;
}
.content-form-signup:focus {
 outline: none;
 border: 1px solid #0cb3d0;
}
.content-login-description {
 margin-top: 25px;
 line-height: 1.63636364;
 color: #747474;
 font-size: .91666667rem;
}
.content-login-link {
 font-size: 16px;
 color: #0dbfdd;
 text-decoration: none;
}

/*输入框无内容便提示*/
#remind_1,
#remind_2 {
 width: 76%;
 margin: 0 auto 2px;
 text-align: left;
 font-size: .2em;
 color: #f00;
}

4 common_form_test.js 注册登录脚本

// 全局变量a和b，分别获取用户框和密码框的value值
var a = document.getElementsByTagName("input")[0].value;
var b = document.getElementsByTagName("input")[1].value;

//用户框失去焦点后验证value值
function oBlur_1() {
 if (!a) { //用户框value值为空
 document.getElementById("remind_1").innerHTML = "请输入用户名！";
 document.getElementById("change_margin_1").style.marginBottom = 1 + "px";
 } else { //用户框value值不为空
 document.getElementById("remind_1").innerHTML = "";
 document.getElementById("change_margin_1").style.marginBottom = 19 + "px";
 }
}

//密码框失去焦点后验证value值
function oBlur_2() {
 if (!b) { //密码框value值为空
 document.getElementById("remind_2").innerHTML = "请输入密码！";
 document.getElementById("change_margin_2").style.marginBottom = 1 + "px";
 document.getElementById("change_margin_3").style.marginTop = 2 + "px";
 } else { //密码框value值不为空
 document.getElementById("remind_2").innerHTML = "";
 document.getElementById("change_margin_2").style.marginBottom = 19 + "px";
 document.getElementById("change_margin_3").style.marginTop = 19 + "px";
 }
}

//用户框获得焦点的隐藏提醒
function oFocus_1() {
 document.getElementById("remind_1").innerHTML = "";
 document.getElementById("change_margin_1").style.marginBottom = 19 + "px";
}

//密码框获得焦点的隐藏提醒
function oFocus_2() {
 document.getElementById("remind_2").innerHTML = "";
 document.getElementById("change_margin_2").style.marginBottom = 19 + "px";
 document.getElementById("change_margin_3").style.marginTop = 19 + "px";
}

//若输入框为空，阻止表单的提交
function submitTest() {
 if (!a && !b) { //用户框value值和密码框value值都为空
 document.getElementById("remind_1").innerHTML = "请输入用户名！";
 document.getElementById("change_margin_1").style.marginBottom = 1 + "px";
 document.getElementById("remind_2").innerHTML = "请输入密码！";
 document.getElementById("change_margin_2").style.marginBottom = 1 + "px";
 document.getElementById("change_margin_3").style.marginTop = 2 + "px";
 return false; //只有返回true表单才会提交
 } else if (!a) { //用户框value值为空
 document.getElementById("remind_1").innerHTML = "请输入用户名！";
 document.getElementById("change_margin_1").style.marginBottom = 1 + "px";
 return false;
 } else if (!b) { //密码框value值为空
 document.getElementById("remind_2").innerHTML = "请输入密码！";
 document.getElementById("change_margin_2").style.marginBottom = 1 + "px";
 document.getElementById("change_margin_3").style.marginTop = 2 + "px";
 return false;
 }
}

5 form_logo.png Logo照片