1、<from action="" method=" post"></form>
action 填写表单提交给谁处理
method 表单提交类型
2、不同类型的 input 元素、复选框、单选按钮、提交按钮等
<input type="text" name="name" readonly disabled size="40" maxlength="80">
<input type="password" name="password">
<input type="radio" name="sex" value="male" checked>
<input type="radio" name="sex" value="femal">
<input type="checkbox" name="a" value="a" >a
<input type="number" min="2" max="8">
<input type="date" name="data">
<input type="color" name="color">
<input type="range" name="a">
<input type="month/week/time/datetime/datetime-local/email/search/tel/url" name="s">
<input type="submit" value="提交">
<input type="reset" value="重置">
3、<fieldset>
<legend>组合表单数据</legend>
</fieldset>
4、<select>
<option selected>a
</select>
<textarea rows="20" cols="30"></textarea>
<button></button>
