1)表单分组控件
<fieldset>
<legend>用户注册</legend>
</fieldset>
2）多文本输入框
<textarea>
sd
</textarea>
3）进度条
step="5" 每次累加5
<input type="range" max="100" step="5">
4）标签
<form action="" method="get">
<input type="time" >
<input type="url" >
<input type="email" >
<input type="date" >
<input type="number" >
<input type="submit" value="submit">
</form>