<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" lang="en"> <head> <title>test reference</title> <style type="text/css"> #test, #control { color: blue; font-weight: bold; border: solid silver thick; letter-spacing: 7em; } </style> </head> <body> <p>The contents of the two silver boxes must be identical.</p> <p id="control">ab cd ef gh i j</p> <p id="test">ab cd ef gh i j</p> </body> </html>