HTML basic tutorial form hidden fields
Hidden field
Function: A hidden field is an invisible box. Pass some value that you don't want others to see.
Use: Mainly used for PHP backend programs, such as: when modifying the content of a certain news, you need to pass the ID number of the news.
Grammar format: <input type = “hidden” name = “name” value = “default value” />
This will be frequently used in future projects , let’s do some understanding first
new file
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>用户注册</title>
</head>
<body>
<font size="5" color="red">欢迎注册php.cn</font>
<form name="user" method="get" action="" >
用户名：<input type="text" name="username"/>
<br/>
密码：<input type="password" name="userpwd"/>
<br/>
性别：<input type="radio" name="sex" value="男" checked=checked>男
<input type="radio" name="sex" value="女">女
<br/>
爱好：<input type="checkbox" name="hobby" value="运动">运动
<input type="checkbox" name="hobby" value="看电影">看电影
<input type="checkbox" name="hobby" value="编程" checked="checked">编程
<input type="checkbox" name="hobby" value="宅着">宅着
<br/>所在地：
<select name="city">
<option value="北京">北京<option>
<option value="上海">上海<option>
<option value="杭州" selected="selected">杭州<option>
<option value="南京">南京<option>
<option value="合肥">合肥<option>
</select>
<br/>个性介绍：<br/><textarea name=" introduction" cols="30" rows="4"></textarea>
<br/><input type="submit" value="提交信息"/>
<input type="reset" value="重填一次"/>
<input type="image" src="http://photocdn.sohu.com/20160107/mp52903269_1452135104978_1_th.png" width="70"/>
<input type="button" onclick="javascript:window.close()" value="关闭窗口"/>
</form>
</body>
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