>>>I have always been curious as to how this is done...
>>>
>>>How do you show a code block on a webpage? For example, when you want to post code on UT, you wrap it in code blocks. How is this implemented?
>>
>>I believe the standard PRE and CODE HTML tags preserve original identation.
>>The syntax coloring is done by the custom code in the parser itself, in the standard HTML there would not be any coloring.
>
>I didn't realize there were standard HTML tags. I thought it was all done in a parser.
>
>Thanks!

Found some samples, though not much http://www.w3schools.com/html/html_formatting.asp (did a very quick search, I liked these tutorials at w3schools site long time ago).

http://www.w3schools.com/html/tryit.asp?filename=tryhtml_computeroutput