Allora..ho sostituito

codice:
<?xml version="1.0" encoding="iso-8859-1"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml">
con
codice:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" http://www.w3.org/TR/html4/loose.dtd>
e gli errori sono scesi a due. Il W3C mi dice:

This page is not Valid HTML 4.01 Transitional!
Below are the results of attempting to parse this document with an SGML parser.

Error Line 2 column 0: "HTTP:" is not a reserved name.
http://www.w3.org/TR/html4/loose.dtd>

Error Line 2 column 0: cannot continue because of previous errors.
http://www.w3.org/TR/html4/loose.dtd>
Come posso ovviare al problema??