#html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>霓虹 - 点击打开你的视野</title>
<link href="../static/css/denglu.css" rel="stylesheet" type="text/css">
<script type='text/javascript' src='../static/js/denglu.js'></script>
</head>
<body>
<div class="box">
<h1>WELCOME</h1>
<h2>登录页面</h2>
<div class="input_box">
<input id="uname" type="text" placeholder="请输入用户名" style="300px">
</div>
<div class="input_box">
<input id="upass" type="password" placeholder="请输入密码" style="300px">
</div>
</div>
<div id="error_box"><br></div>
<div class="input_box">
<button onclick="fnLogin()">登录</button><br>
<a class="link-forget cl-link-blue"href="get_password.html">忘记密码</a>
<a class="link-forget cl-link-blue"href="index.php?type=login">注册</a>
</div>
</body>
</html>
#js
function fnLogin() {
var oUname = document.getElementById("uname")
var oError = document.getElementById("error_box")
var oUpass = document.getElementById("upass")
oError.innerHTML = "<br>"
if (oUname.value.length < 6 || oUname.value.length > 20) {
oError.innerHTML = "用户名6-20位";
return;
} else if ((oUname.value.charCodeAt(0) >= 48) && (oUname.value.charCodeAt(0) <= 57)) {
oError.innerHTML = "first letter.";
return;
} else for (var i = 0; i < oUname.value.length; i++) {
if ((oUname.value.charCodeAt(i) < 48) || (oUname.value.charCodeAt(i) > 57) && (oUname.value.charCodeAt(i) < 97) || (oUname.value.charCodeAt(i) > 122)) {
oError.innerHTML = "only letter or number";
return;
}
if (oUpass.value.length < 6 || oUpass.value.length > 12) {
oError.innerHTML = "密码6-12位"
return;
}
}
window.alert("登录成功！！")
}
#css
body{
padding-right:200px;
padding-left:200px;
color: indianred;
padding-top: 40px;
font-size: 15px;
background: lightpink;
font-family:verdana,Arial,Helvetica,sans-serif;
}
h1{
font-size: 25px;
}
h2{
padding-left: 100px;
}
