It is not HTML, really. HTML does not have a reliable way to produce Greek letters in any browser. If you install a Greek character set in your computer and go to a Greek website, you will see Greek in a variety of fonts because the server supplies a page-level language meta information; you cannot do so by posting into a page served in English by the Free Republic server. What Kolokotronis uses is a hack that works ofr some readers, but not for others, and only with one "Greek" font. It is not really even Greek, as I am about to explain. MS-Windows computers have a font called "symbol". It associates Greek glyphs with Latin letters, rather idiotically, by how they look. For example, W is glyphed Omega because it sort of looks like it (both Omicron and Omega sound as O in most languages). If your computer has this font, -- and it is a part of the stadnard Windows intallation -- you can select that font in your word processor, and type "o Wn" and get Omicron Omega Nu glyphed. If you don't --e.g. you have a Mac or a Linux, -- you get "o Wn" in the default font of that machine.
HTML allows to specify the font. The tag is <FONT FACE=arial> <FONT FACE=dingbat>, or what have you. You can add two other attributes, SIZE or COLOR. It has to be closed with </FONT>
This is what I am going to type at the end of this message:
<FONT FACE=symbol>o Wn</FONT><BR>And this is how it is going to look in your browser. If you have Symbol and Wingdings, you will see "o Wn" glyphed in these fonts, and if you don't, you will only see "o Wn" each time.
<FONT FACE=wingdings>o Wn</FONT><BR>
<FONT FACE=arial>o Wn</FONT><BR>
o Wn
o Wn
o Wn
Very interesting stuff. I may have to learn to play with that...