<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://apps.bdimg.com/libs/jquerymobile/1.4.5/jquery.mobile-1.4.5.min.css">
<script src="https://apps.bdimg.com/libs/jquery/1.10.2/jquery.min.js"></script>
<script src="https://apps.bdimg.com/libs/jquerymobile/1.4.5/jquery.mobile-1.4.5.min.js"></script>
<div data-role="main" class="ui-content">
<form method="post" action="demoform.php">
<label for="fname" class="ui-hidden-accessible">姓名:</label>
<input type="text" name="fname" id="fname" placeholder="姓名...">
<input type="submit" data-inline="true" value="提交">