完成登录与注册页面的前端
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
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>登录</title> <script src="../static/js/wr.js"></script> <link href="../static/css/wr.css" rel="stylesheet" type="text/css"> </head> <body> <div class="box"> <h2>登录</h2> <div class="input-box"> <input type="text" name="firstname" placeholder="输入用户名"><br> </div> <div class="input_box"> <input id="upass" type="password" placeholder="输入密码" > </div> <div id="error_box"><br></div> <div class="input_box"> <button onclick="fnLogin()">登录</button> </body> </html>
function fnLogin() { var oUname = document.getElementById("uname"); var oUpass = document.getElementById("upass"); var oError = document.getElementById("error_box"); oError.innerHTML="<br>" //uname if(oUname.value.length>20 || oUname.value.length < 6){ oError.innerHTML = "name:6-20"; return; }else if((oUname.value.charCodeAt(0)>=48) && (oUname.value.charCodeAt(0)<=57)){ oError.innerHTML="first number."; 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="用户名只能包括字母和数字"; return; } } //upass if(oUpass.value.length>20 || oUpass.value.length <6){ oError.innerHTML="password:6-20"; return; } window.alert("登录成功") }
*{
margin: 0;
padding: 0;
font-family: "微软雅黑";
font-size: 12px;
}
.box{
width: 390px;
height: 320px;
border: salmon;
background:seashell;
position: absolute;
left: 50%;
top: 42%;
margin-left: -195px;
margin-top: -160px;
}