HTML5中的表单元素有哪些

<form action="#" method="get">
选课： <input type="text" list="subject" />
<datalist  id="subject">
	<option label="Math" value="数学" />
	<option label="English" value="英语" />
	<option label="Chinese" value="语文" />
</datalist>
<input type="submit" />
</form>

<form action="#" method="get">
用户名<input type="text" name="username" />
密码：<input type="password" name="password" />
<keygen name="security" />
<input type="submit" />
</form>

<form oninput="c.value=parseInt(a.value)+parseInt(b.value)">
		<input type="text" name="加数" id="a">+
		<input type="text" name="被加数" id="b">=
		<output name="c" for="a b"></output>
	</form>