[jQuery] img src replacement

[Glen_H]

In my footer I have a sign where I want it to say one thing regularly,
and then when someone hovers, i want it to say sometyhing else. I
basically made 2 images, and I just want to switch images on the
hover.

here is my code I used and its not working.:

$("#footer #footer-contain #availability img").hover(function () {
                        $(this).attr({'img src' : './images/avail_hover.png'});
                                                           }



can anyone help me out with what I need to do?