js实现登录与注册界面
作者:yishhaoo
这篇文章主要为大家详细介绍了js实现登录与注册界面,具有一定的参考价值,感兴趣的小伙伴们可以参考一下
完成登录与注册页面的HTML+CSS+JS,其中的输入项检查包括:
用户名6-12位
首字母不能是数字
只能包含字母和数字
密码6-12位
注册页两次密码是否一致
html代码:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>欢迎你,请先登陆!</title> <script type="text/javascript" src="../static/jsp/lx.js"></script> <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"> <link rel="stylesheet" href="../static/css/lx.css"> </head> <body> <div class="box"> <h2>登陆</h2> <div class="input_box"> <input id="uname" type="text" name="user" placeholder="请输入用户名"> </div> <div class="input_box"> <input id="upass" type="password" name="psw" placeholder="请输入密码"> </div> <div id="error_box"><br></div> <div class="input_box"> <button type="button" class="btn btn-primary" onclick="fnLogin()">登陆</button>     <a href="regist.html"><input type="button" class="btn btn-info" name="regist" value="注册"></a> </div> </div> </body> </html>
css代码:
*{ margin: 0; padding: 0; font-family: 微软雅黑; font-size: 12px; } .box{ width: 390px; height: 320px; border: solid 1px #ddd; background: #FFF; position: absolute; left: 50%; top:42%; margin-left: -195px; margin-top: -160px; text-align: center; } .box h2{ font-weight: normal; color:#666; font-size: 16px; line-height: 40px; overflow: hidden; text-align: center; border-bottom: solid 1px #ddd; background: #f7f7f7; } .input_box{ width:350px; padding-bottom: 15px; margin: 0 auto; overflow: hidden; }
javascript代码:
function fnLogin() { var oUname = document.getElementById("uname") var oUpass = document.getElementById("upass") var oError = document.getElementById("error_box") var isError = true; if (oUname.value.length > 20 || oUname.value.length < 6) { oError.innerHTML = "用户名请输入6-20位字符"; isError = false; return; }else if((oUname.value.charCodeAt(0)>=48) && (oUname.value.charCodeAt(0)<=57)){ oError.innerHTML = "首字符必须为字母"; return; }else for(var i=0;i<oUname.value.charCodeAt(i);i++){ if((oUname.value.charCodeAt(i)<48)||(oUname.value.charCodeAt(i)>57) && (oUname.value.charCodeAt(i)<97)||(oUname.value.charCodeAt(i)>122)){ oError.innerHTML = "必须为字母跟数字组成"; return; } } if (oUpass.value.length > 20 || oUpass.value.length < 6) { oError.innerHTML = "密码请输入6-20位字符" isError = false; return; } window.alert("登录成功") }
注册界面html代码:
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>欢迎你,请先登陆!</title> <script type="text/javascript" src="../static/jsp/lx.js"></script> <link href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet"> </head> <body> <div id="container" style="width: 400px" align="center"> <div id="header" style="background-color: aquamarine"> <h2 align="center">注册</h2> </div> <div id="content"> <p align="center">账号: <input id="uname" type="text" name="user" placeholder="账号首字符为字母"> </p> <p align="center">密码: <input id="upass" type="password" name="psw" placeholder="请输入密码"> </p> <div id="error_box"><br></div> <br> <button onclick="fnLogin()" class="btn btn-info">注册</button> </div> <div style="background-color: aquamarine"> <i>版权信息@</i> </div> </div> </body> </html>
运行结果如下:
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。