What's Newin Internet Explorer 6
http://msdn.microsoft.com/workshop/essentials/whatsnew/whatsnew60_entry.asp?frame=true
Internet Explorer 6 offers extended Synchronized Multimedia Integration Language (SMIL) 2.0 HTML+TIME (Timed Interactive Multimedia Extensions) functionality, which now includes the transitionFilter element. This enables HTML declarations to provide full-feature animated transitions without using script.