這篇文章主要為大家詳細介紹了js實現登入與註冊介面,具有一定的參考價值,有興趣的小夥伴們可以參考一下
完成登入與註冊頁面的HTML+CSS+ JS,其中的輸入項檢查包括:
用戶名6-12位元
首字母不能是數字
只能包含字母和數字
密碼6-12位元
註冊頁兩次密碼是否一致
html代碼:
<!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> <p class="box"> <h2>登陆</h2> <p class="input_box"> <input id="uname" type="text" name="user" placeholder="请输入用户名"> </p> <p class="input_box"> <input id="upass" type="password" name="psw" placeholder="请输入密码"> </p> <p id="error_box"><br></p> <p 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> </p> </p> </body> </html>
*{ 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; }
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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") }
<!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> <p id="container" style="width: 400px" align="center"> <p id="header" style="background-color: aquamarine"> <h2 align="center">注册</h2> </p> <p 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> <p id="error_box"><br></p> <br> <button onclick="fnLogin()" class="btn btn-info">注册</button> </p> <p style="background-color: aquamarine"> <i>版权信息@</i> </p> </p> </body> </html>
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