title: Change thumbnail image on rollover in the loop
body: <p><br>
  I've got a question. I am working with wordpress and have a blog which posts are presented with thumbnails. I'd like those thumbnails change when you put your mouse on. The problem is that I want different images change thumbnails. basically, each thumbnail would have its unique rollover image. the problem is that i don't quite know how to attach js code to the loop. And how it should look like to create different rollover images for different posts<br>
  if i attach js code to the permalink, it will change all thumbnails into the same picture. 
  also, i was told it is possible to do with jquery. is it worthy?<br>
  i was trying to be as clear as possible<br>
  any help is appreciated!  </p>