提示： 元素是一种表单控件，可用于在表单中接受用户输入。
html select标签的属性
属性
值
描述
autofocus
autofocus
规定在页面加载时下拉列表自动获得焦点。
disabled
disabled
当该属性为 true 时，会禁用下拉列表。
form
form_id
定义 select 字段所属的一个或多个表单。
multiple
multiple
当该属性为 true 时，可选择多个选项。
name
text
定义下拉列表的名称。
required
required
规定用户在提交表单前必须选择一个下拉列表中的选项。
size
number
规定下拉列表中可见选项的数目。
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