To add accented letters and other symbols to a webpage, you can use the numeric or name codes shown below.
How it works:
HTML Codes - Characters and symbols
http://www.ascii.cl/htmlcodes.htm
Orthographic diacritics and multilingual computing
http://www.phon.ucl.ac.uk/home/wells/dia/diacritics-revised.htm
Character finder - a site where you can find out which accented letters or other characters are used in which language(s), and other useful information about characters, fonts and unicode: http://transliteration.eki.ee/