这个autofocus说是加载时本项自动选中，但是为啥跑了没反应啊
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>提交按钮</title>
</head>
<body>
<form method="post" action="save.php">
<label for="myName">姓名：</label>
<input type="text" value=" " name="myName " autofocus="autofocus" />
<input type="submit" value="提交" name="submitBtn" />
</form>
</body>
</html>
