Standardize displays on Web portals running on Firefox3 and Internet Explorer 7

Standardize displays on Web portals running on Firefox3 and Internet Explorer 7: "Do Firefox3 and Internet Explorer 7 look different? What's the best way to get these browsers to behave the same way? Should you use pixels or em values? Regular developerWorks author Judith M. Myerson shows you how to standardize displays on Web portals running on Firefox and IE. She gives tricks and tips for using em values to make the job of developing the contents of portals, including Asynchronous JavaScript + XML (Ajax) applications, much easier."