I visit several forums and some have a spell checker, but most do not. BITOG forums is also one that does not have a spell checker. But good news!!! Please check out this link (no money or credit for me) http://www.iespell.com/ .
I have nothing to gain from this link other than to introduce you to a very handy tool I use all the time and you can use it before you post in here to check your spelling and ADD new words if you like to the dictionary. In your browser tool-bar above there will be a icon with abc and a check mark underneath it. That is where you click to use the ieSpell program to check your messages on this forum. Keeps things neat and orderly.. best of all it's free for non commercial use.. which you as posters are not commercial. Your browser at home is your own, not a corporation. Works in any forums site I've found and saves a lot of going back in and editing goofs.