Provide two versions of jQuery, one for old browsers and one for new. See more details at http://martineau.tv/blog/2013/06/two-versions-of-jquery/

jquery-fallback.html

<!--[if lte IE 8]>
    <script src="//ajax.googleapis.com/ajax/libs/jquery/1.10.1/jquery.min.js"></script>
	<script>window.jQuery || document.write('<script src="/js/libs/jquery.min.js"><\/script>')</script>
<![endif]-->
<!--[if gt IE 8]><!-->
	<script src="//ajax.googleapis.com/ajax/libs/jquery/2.0.2jquery.min.js"></script>
	<script>window.jQuery || document.write('<script src="/js/libs/jquery.2.min.js"><\/script>')</script>
<!--<![endif]-->