Althought CSS3 is currently fully supported by recent browsers, there are many problems when finding a “falling back” solution for IE <= 8. We can surely change the way we display HTML code, or use javascript for some contents, but these are also not in our favor. Fortunatelly, there is a library called Selectivizr providing an “IE-CSS3 library” http://selectivizr.com/.
This lib can be used with jQuery, Prototype, DOMAssistant, or several other libraries under the hood. We can include these libs to our website as follows:
<!--[if (gte IE 5.5)&(lte IE 8)]> <script type="text/javascript" src="js/DOMAssistantCompressed-2.8.js"></script> <script type="text/javascript" src="js/ie-css3.js"></script> <![endif]-->