Okay since this was brought up about spell checking for users i am gonna write this up. This is how you get the 3 major browsers to use and identify a spell check utility and make use of it.
All in all Mozilla Firefox is the easiest to do this with. From version 2.0 and on of Firefox there is a in line built in spell checker for Firefox that works great. Just get the appropriate language file needed and be off with it.
Opera is a bit more difficult. There are 2 ways i have found to do it. First is to install and use Aspell.
GNU Aspell
Just download and install that and then download the language file and install that and Opera after a restart will recognize Aspell being installed and use it accordingly. Just right click in any text field and the Spell Check option will be available.
The 2nd way is by going to the Opera Community site:
[UserJS] OSpell - A Better Opera Spell Checker - User JavaScript - Opera Community [UserJS] Orangoo Spell Check - User JavaScript - Opera Community
Here you can search for the UserJS scripts which will include the spell checker in line and such. After you type just click the little box that it adds to the post box and it will do a spell check for you. If you need help getting the JS files to work let me know. I have already done this and can guide you myself.
IE is pretty much the same way as Opera. There are several add-ons that can be given to IE to spell check. But nothing like Firefox with its built in spell checker. Above and beyond the best i have used is IE7Pro.
IE7Pro - The Ultimate Add-On for Internet Explorer
This installs and is just a small extension type add-on for IE. It will do ad blocking and spell checking easily. This is my personal favorite and the one I use. But there are plenty more. Just visit the IE add on site for more:
Windows Marketplace: IE Add-Ons
So there you have it. The 3 major browsers with ways to use the spell checkers.