JavaScript 获取网页中第一个图片 id 的方法

<!DOCTYPE html>
<html>
<body>
<img id="klematis lilac" border="0" src="klematis.jpg" 
width="148" height="112">
<img id="klematis pink" border="0" src="klematis2.jpg" 
width="149" height="118">
<p>Id of first image:
<script>
document.write(document.images[0].id);
</script></p>
</body>
</html>

Id of first image:klematis lilac