Does Internet Explorer support CSS transitions?
The page you link to has a compatibility table. Chrome 1.0 (-webkit prefix) Firefox 4.0 (2.0) (-moz prefix) 16.0 (16.0) (no prefix) Internet Explorer 10.0 (no prefix) Opera 10.5 (-o prefix) 12.0 (no prefix) Safari 3.2 (-webkit prefix) There is also an article on MSDN about CSS3 transitions in Internet Explorer.