Crediting photos used on website (copyright)
I purchased some (royalty-free) photos to use for a friend's website.
This is the first time I've used photos that are not my own, and so have not dealt with crediting others' copyright.
Here is my question:
Am I *required* to credit the photographer and Dreamstime, or is it a courtesy?
I ask because the nature in which I am using some of the photos (as div backgrounds with text on overlaid on top) would make it difficult to also add a mouseover editorial credit for the photography. Some photos would be easy, but others would not because of the way they are being used.
I suppose I could add a section somewhere on the website that just lists all of the photographs and their respective photographers.
How have others handled this?
Photo credits: Flashon Studio.