University of Washington	Computing & Communications

Back In The Early Days

The version 4 browsers were created before standards were worked out

• Incomplete implementations of CSS
• Inconsistent implementations of Javascript
• Interpreted HTML somewhat differently

HTML 3.2 and 2.0 were loose

• End tags were optional
• Tables was the best available way to do layout

Getting pages to work was difficult

• Had to test for which type of browser was being used
• Had to have conditional code, different for different browsers
• Required extensive testing