<input type="text" name="username" id="username" value="" placeholder="请输入用户名"/> 代码含义
时间: 2024-06-02 15:04:48 浏览: 7
这段代码是一个 HTML 表单元素,它创建了一个文本输入框,让用户可以在输入框中输入自己的用户名。name 属性用于标识输入框的名称,id 属性用于标识该输入框的唯一性。placeholder 属性用于在输入框中显示默认提示信息。当用户在输入框中输入内容时,可以通过 JavaScript 或其他后端技术获取该输入框中的值,以便进行后续操作。
相关问题
<html> <head> <meta charset="UTF-8"> <title>星星国际影城-用户登录界面</title> <link href="css/login.css" rel="stylesheet" type="text/css" /> <script src="js/login.js"></script> </head> <body> <div id="login"> <div class="logo">xx国际影城</div> <form action="#" method="post"> <div> <label>用户名:</label> <input type="text" placeholder="请输入用户名" name="userName" value=""/> </div> <div> <label>密 码:</label> <input type="password" placeholder="请输入密码" name="password" value=""/> </div> <!--用户输入错误时的提示信息--> <span></span> <a id="loginBtn">登录</a > </form> <p>还不是我们的会员?<a href=" " target="_blank">立即注册</a ></p > </div> </body> </html>。在每行代码后面加上解释
<html> <!-- HTML文档的开始标签 -->
<head> <!-- 页面头部信息包括标题、样式表和脚本文件等 -->
<meta charset="UTF-8"> <!-- 设置字符编码 -->
<title>星星国际影城-用户登录界面</title> <!-- 页面标题 -->
<link href="css/login.css" rel="stylesheet" type="text/css" /> <!-- 引入外部样式表 -->
<script src="js/login.js"></script> <!-- 引入外部脚本文件 -->
</head>
<body> <!-- 页面主体部分 -->
<div id="login"> <!-- 登录框的容器 -->
<div class="logo">xx国际影城</div> <!-- 影城的标志 -->
<form action="#" method="post"> <!-- 登录表单的提交方法 -->
<div> <!-- 用户名输入框和标签的容器 -->
<label>用户名:</label> <!-- 用户名输入框的标签 -->
<input type="text" placeholder="请输入用户名" name="userName" value=""/> <!-- 用户名输入框 -->
</div>
<div> <!-- 密码输入框和标签的容器 -->
<label>密 码:</label> <!-- 密码输入框的标签 -->
<input type="password" placeholder="请输入密码" name="password" value=""/> <!-- 密码输入框 -->
</div>
<!--用户输入错误时的提示信息-->
<span></span> <!-- 提示信息的容器 -->
<a id="loginBtn">登录</a > <!-- 登录按钮 -->
</form>
<p>还不是我们的会员?<a href=" " target="_blank">立即注册</a ></p > <!-- 注册提示 -->
</div>
</body>
</html> <!-- HTML文档的结束标签 -->
把一下代码生成流程图 <!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>register</title> <link rel="stylesheet" href="css/register.css"> <script src="js/zone.js"></script> </head> <body> <table align="center" cellpadding="5px"> <tr> <td> </td> <td align="left">注册</td> </tr> <tr> <td align="right">用户名:</td> <td> <input type="text" id="username" autocomplete="off" placeholder="输入姓名"> </td> </tr> <tr> <td align="right">密码</td> <td> <input type="password" id="password" placeholder="输入密码"> </td> </tr> <tr> <td align="right">确认密码</td> <td> <input type="password" id="repwd" placeholder="确认密码"> </td> </tr> <tr> <td> </td> <td> <input type="button" value="注册" id="register" onclick="reg()"> <a href="login.html">登录</a> </td> </tr> </table> </body> </html>
很好,我会为您生成代码的流程图。首先,整个代码的流程图可以分为两个大的模块:HTML和JavaScript。以下是HTML模块的流程图:
```
start -> HTML
HTML -> head
head -> meta charset
head -> meta http-equiv
head -> meta name
head -> title
head -> link
head -> script
HTML -> body
body -> table
table -> tr
tr -> td
td -> text "注册"
td --> td
td -> input type="text" id="username" autocomplete="off" placeholder="输入姓名"
tr --> table
table -> tr
tr -> td
td -> text "用户名:"
td --> td
td -> input type="password" id="password" placeholder="输入密码"
tr --> table
table -> tr
tr -> td
td -> text "确认密码"
td --> td
td -> input type="password" id="repwd" placeholder="确认密码"
tr --> table
table -> tr
tr -> td
td -> input type="button" value="注册" id="register" onclick="reg()"
td --> td
td -> a href="login.html"
tr --> table
table --> body
body --> HTML
HTML --> end
```
然后是JavaScript模块的流程图:
```
start -> JavaScript
JavaScript -> input type="button" id="register" onclick="reg()"
input type="button" id="register" onclick="reg()" -> function reg()
function reg() -> var username = document.getElementById("username").value
function reg() -> var password = document.getElementById("password").value
function reg() -> var repwd = document.getElementById("repwd").value
function reg() -> if (username == "" || password == "" || repwd == "")
if (username == "" || password == "" || repwd == "") -> alert("请填写完整信息!")
function reg() --> if
if (username == "" || password == "" || repwd == "") --> end
function reg() -> if (password != repwd)
if (password != repwd) -> alert("两次密码输入不一致!")
function reg() --> if
if (password != repwd) --> end
function reg() -> else
else -> alert("注册成功!")
function reg() --> else
else --> end
JavaScript --> end
```
希望我的回答可以帮助到您!
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