如果你想为搜索查询创建一个单行文本框，可以使用HTML5为此提供的一个专用输入控件
<!DOCTYPE html>
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<html>
<head>
<title>TODO supply a title</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
</head>
<body>
<div>TODO write content</div>
<form action="http://www.example.org/search.php">
<p>搜索:</p>
<input type="search" name="search" />
<input type="submit" value="Search" />
</form>
</body>
</html>