W3School TIY Editor

<!DOCTYPE html>
<html>
<head>
<link rel="stylesheet" href="http://code.jquery.com/mobile/1.3.2/jquery.mobile-1.3.2.min.css">
<script src="http://code.jquery.com/jquery-1.8.3.min.js"></script>
<script src="http://code.jquery.com/mobile/1.3.2/jquery.mobile-1.3.2.min.js"></script>
</head>
<body>

<div data-role="content">
    <form method="post" action="demoform.asp">
      <fieldset data-role="fieldcontain">
        <label for="day">选择日期</label>
        <select name="day" id="day">
          <option value="mon">Monday</option>
          <option value="tue">Tuesday</option>
          <option value="wed" selected>Wednesday</option>
          <option value="thu">Thursday</option>
          <option value="fri">Friday</option>
          <option value="sat">Saturday</option>
          <option value="sun">Sunday</option>
        </select>
      </fieldset>
      <input type="submit" data-inline="true" value="提交">
    </form>
  </div>
</div>

</body>
</html>