35. 読み込み方法
<!--[if lt IE 9]>
NG
<script src="jquery-1.11.1.js"></script>
<![endif]-->
<!--[if gte IE 9]><!-->
<script src="jquery-2.1.1.js"></script>
<!--<![endif]-->
jQuery 2.0 Beta 3 Released | Official jQuery Blogより
http://blog.jquery.com/2013/04/09/jquery-2-0-beta-3-released/
36. 読み込み方法
If you want, you can serve 2.0 to newer
browsers and 1.9 to older ones using our
conditional comment trick, but that is not
required.
jQuery 2.0 Released | Official jQuery Blogより
http://blog.jquery.com/2013/04/18/jquery-2-0-released/