Real time webpage comparison in different Explorer Versions

With the recent release of Internet Explorer 8, Microsoft has added some subtle changes about how the HTML web pages are rendered. So the new challenge is: how to upgrade web pages that work in the old IE 6 to work in the newer Explorer 7 and 8 versions?

Fortunately, Microsoft has released a new tool to help migrating websites optimized for Internet Explorer 6 to the new Explorer 7 and 8: Expression Web SuperPreview.

Super Preview allows real time webpage comparison of the HTML rendering using different Explorer versions. Both webpages are simultaneously displayed, overlapping the output of each Explorer window, so you can detect (and correct) even the most subtle difference of Internet Explorer!