No offense, but it sounds like you should seriously research this before you by it. Before I bought my cham I researched for over month, reading books, online articles, talking to vets, etc. because I was so freaked out that I'd kill the poor guy after hearing what my vet told me about them.
My Chameleon is the most expensive reptile I've kept. I've had my veiled since January and have spent over 300 on him alone already. That 100 bucks a month. They are a very demanding pet.
And as for that book . . . Chameleons, 99.9% of them, will never ever EVER drink standing water! They can't recognize water unless it's flowing (A direct quote from Dr. Gary, my herp vet with about 10 years of chameleon keeping under his belt). And the only time I've seen one drink from a dish is at a corporate pet store, and that was only because he was so dehydrated and desperate for water.
Please do your research before you get the little guy killed.