Internet Explorer Support using conditional comments. The following snippet adds HTML5 and CSS3 support in older versions of Internet Explorer.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>IE Support</title>
<!-- Reset Includes HTML5 Support -->
<link rel="stylesheet" href="css.lecoapps.com/meyer-reset.css">
<!--[if (gte IE 6)&(lte IE 8)]>
<script src="//js.lecoapps.com/nwmatcher.js"></script>
<script src="//js.lecoapps.com/selectivizr-min.js"></script>
<script src="//js.lecoapps.com/response.js"></script>
<script src="//js.lecoapps.com/html5.js"></script>
<script src="//js.lecoapps.com/respond.js"></script>
<![endif]-->
<body>
</body>
</head>
</html>