HI I have a question about codification.
I'm Spanish and the Spanish language have some characters that English language doesn't have.
For example: (accents in the vowels) á é í ó ú
In order to get an á, we have to write á to get the character.

If I'm using UTF-8 codification, it's necesary to use á or just á?. I think tahn only á will work, actually, I'm using UTF-8, but I might be wrong.

Does anyone know it?

Thank you!

With UTF-8 I am pritty sure you will not have any problems with spanish - you can use just á

I think either will work, you shouldn't run into any problems. Although, I would just use the UTF-8 to be safe.

I'd recommend encoding your pages as UTF-8 and use HTML entities for all non 7bit characters.

á = á
é = é
í = í
ó = ó
ú = ú
¿ = ¿

This is what I did when I worked at RealNetworks. Most of my stuff had to work in 12 languages. Encoding errors could cause javascript errors and other bits of pain. By using entities for everything, reliability increased.
I wrote a little program to convert UTF8 encoded text files (received from the translators) and convert them to HTML entity values. This allowed them to publish without me.