zoukankan html css js c++ java

完成登录与注册页面的前端

题目：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

答：

HTML

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>注册</title>
    <link href="../static/css/js23.css" rel="stylesheet" type="text/css">
    <script src="../static/js/js23.js"></script>
</head>
<body>
<div class="box">
    <h2>忆之虾会员注册页面</h2>
        <h3></h3>
    <div class="input_box">
        <input id="uname" type="text" placeholder="请输入用户名" style="280px">

    </div>
    <div class="input_box">
        <input id="upass" type="password" placeholder="请输入密码" style="280px">
    </div>
    <div class="input_box">
        <input id="uupass" type="password" placeholder="请重复输入密码" style="280px">
    </div>
    <div class="input_box">
        <input id="nname" type="password" placeholder="请输入昵称" style="280px">
    </div>
    </div>
    <br>
   <div id="error_box"><br></div>
    <div class="input_box">
        <button onclick="fnLogin()">注册</button><br>
        注册遇到问题？

    </div>
</div>
<script>
    window.alert("go!")
</script>
</body>
</html>

CSS、

body{
    background: #fbfff8;
    padding-right:230px;
    padding-left:230px;
    color: rgba(255, 254, 222, 0.91);
    padding-top: 40px;
    font-size: 16px;
    background: #95beff;
    font-family:verdana,Arial,Helvetica,sans-serif;
}
h2{
    padding-left: 60px;
}
h3{
    padding-left: 120px;
}
.box{
     background-color: rgba(255, 191, 144, 0.87);
            text-align:center;
            font-family: "华文彩云";
            color:white;
            font-size: 50px;
}

function fnLogin() {
    var oUname = document.getElementById("uname")
    var oName = document.getElementById("nname")
    var oError = document.getElementById("error_box")
    var oUpass = document.getElementById("upass")
    var ooUpass=document.getElementById("uupass")
    oError.innerHTML = "<br>"
    //unname
    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;
        }
    }

    //upass
    if (oUpass.value.length < 6 || oUpass.value.length > 12) {
        oError.innerHTML = "密码6-12位"
        return;
    }
    //uupass
    if (ooUpass.value!=oUpass.value) {
        oError.innerHTML = "重复密码错误"
        return;
    }
    //name
    if (oName.value.length < 3 || oUpass.value.length > 6) {
        oError.innerHTML = "昵称3-6位";
        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;
        }
    }
                window.alert("登陆成功！")


        }

登录页面

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>登录 </title>
    <link href="../static/css/js23.css" rel="stylesheet" type="text/css">
    <script src="../static/js/js23.js"></script>
</head></h2>
<body>
<div class="box">
    <h2>忆之虾会员登录页面</h2>
        <h3></h3>
    <div class="input_box">
        <input id="uname" type="text" placeholder="请输入用户名" style="280px">
        <input id="upass" type="password" placeholder="请输入密码" style="280px">
    </div>
   
    <br>
   <div id="error_box"><br></div>

    <div class="input_box">
        <button onclick="fnLogin()">登录</button><br>

    </div>
 <div class="line">

        最终解释权归忆之虾所有

    </div>
</div>
<script>
    window.alert("go!")
</script>
</body>
</html>

JS:

function fnLogin() {
    var oUname = document.getElementById("uname")
    var oName = document.getElementById("nname")
    var oError = document.getElementById("error_box")
    var oUpass = document.getElementById("upass")
    var ooUpass=document.getElementById("uupass")
    oError.innerHTML = "<br>"
    //unname
    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;
        }
    }

    //upass
    if (oUpass.value.length < 6 || oUpass.value.length > 12) {
        oError.innerHTML = "密码6-12位"
        return;
    }
    //uupass
    if (ooUpass.value!=oUpass.value) {
        oError.innerHTML = "重复密码错误"
        return;
    }
    //name
    if (oName.value.length < 3 || oUpass.value.length > 6) {
        oError.innerHTML = "昵称3-6位";
        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;
        }
    }
                window.alert("登陆成功！")


        }

CSS:

body{
    background: #fbfff8;
    padding-right:230px;
    padding-left:230px;
    color: rgba(255, 254, 222, 0.91);
    padding-top: 40px;
    font-size: 16px;
    background: #ffc38d;
    font-family:verdana,Arial,Helvetica,sans-serif;
}
h2{
    padding-left: 60px;
}
h3{
    padding-left: 120px;
}
.box{
     background-color: rgba(255, 137, 105, 0.87);
            text-align:center;
            font-family: "宋体";
            color:white;
            font-size: 30px;
}
.input_box{

            text-align:center;
            font-family: "华文宋体";
            color:white;
            font-size: 20px;

}
.line{
           text-align:center;
            font-family: "华文细黑";
            color:white;
            font-size: 20px;

}

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原文地址：https://www.cnblogs.com/1244581939cls/p/7760705.html