<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>欢迎来到登录界面，请登录</title>
<script type="text/javascript" src="sdda.js"></script>
<link rel="stylesheet" href="sdf.css">
</head>
<body>
<p id="meto">中国标准时间</p>
<script>document.getElementById("meto").innerHTML = Date()</script>
<div id="container" style="width: 300px" align="center">
<div id="header" style="background-color: yellow"><h2 align="center">登陆界面</h2></div>
<div id="content" style="background-color: aqua">
<p align="center">用户名：<input id="uname" type="text" name="user" placeholder="请输入账号">
</p>
<p align="center"> 密码 ：<input id="upass" type="password" name="psw" placeholder="请输入密码"></p>
<br>
<div id="error_box"><br>
</div>
<input type="radio" value="stu">用户
<input type="radio" value="tea">会员
<br>
<input type="checkbox" value="true">记住密码 <a href="">登陆遇到问题</a><br>
<button onclick="fnLogin()">登陆</button>
   
<input type="button" name="regist" value="注册">
</div>
<div id="footer" style="background-color: crimson"><h3 align="center">版权@hir</h3></div>
</div>
</body>
</html>
1 function fnLogin() {
2 var oUname = document.getElementById("uname");
3 var oError = document.getElementById("error-box");
4 var oUpass = document.getElementById("upass");
5 var oUpass = document.getElementById("upass1")
6 var isoError = true;
7 oError.innerHTML = "<br>";
8
9 if (oUname.value.length<6||oUname.value.length>20){
10 oError.innerHTML="用户名要6-20位";
11 isoError = false;
12 return;
13 }
14 else if(oUname.value.charCodeAt(0)>=48&&(oUname.value.charCodeAt(0)<=57)){
15 oError.innerHTML = "用户名首字母必须是字母";
16 return;
17 } else for(var i=0;i<oUname.value.length;i++){
18 if((oUname.value.charCodeAt(i)<48||oUname.value.charCodeAt(i)>57)&&(oUname.value.charCodeAt(i)<97||oUname.value.charCodeAt(i)>122)){
19 oError.innerHTML = "用户名必须为字母或数字";
20 return;
21 }
22 }
23
24
25 if (oUpass.value.length<6||oUpass.value.length>20){
26 oError.innerHTML="密码至少6-20位";
27 isoError = false;
28 return;
29
30 }
31 window.alert("注册成功")
32 }
1 <!DOCTYPE html>
2 <html lang="en">
3 <head>
4 <meta charset="UTF-8">
5 <title>注册</title>
6 <script src="zhuce.js"></script>
7 </head>
8 <body>
9 <div class="box">
10 <h1>注册</h1>
11 <div class="input-box">
12 账号：<input id="uname" type="text" placeholder="请输入用户名">
13 </div>
14 <div class="input-box">
15 密码：<input id="upass" type="password" placeholder="请输入密码">
16 </div>
17 <div class="input-box">
18 密码：<input id="upass1" type="password" placeholder="请再次输入密码">
19 </div>
20 <div id="error-box"><br></div>
21 <div class="input-box">
22 <button onclick="fnLogin()">确认注册</button>
23 </div>
24 </div>
25 </body>
26 </html>
function fnLogin() {
var oUname = document.getElementById("uname")
var oUpass = document.getElementById("upass")
var oError = document.getElementById("error_box")
oError.innerHTML = "<br>"
if (oUname.value.length > 20 || oUname.value.length < 6) {
oError.innerHTML = "用户名为6-20位字符";
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 > 20 || oUpass.value.length < 6) {
oError.innerHTML = "密码为 6-20位字符";
return;
}
window.alert("登陆成功")
}
