week
包含根据ISO 8601编码的年份和周数的日期。
例子 (Example)
<!DOCTYPE HTML>
<html>
<body>
<form action = "/cgi-bin/html5.cgi" method = "get">
Week : <input type = "week" name = "newinput" />
<input type = "submit" value = "submit" />
</form>
</body>
</html>
