images / alt text / title

Here's question 2:

If I'm using a bunch of images as buttons in a navigation bar, the 
best thing to do would be to give brief  "alt" text for each, and a 
fuller description of where the link goes in the "title" attribute.

At the moment the site I'm thinking of has longish descriptions of 
where the buttons link to, in their "alt" , but no "title".

Again, let me know if there's any strong opinions either way!

Cheers ears

Rebecca