How to make Imagefield slideshow display full width I use Drupal 7.20 and try to make my imagefield just like PULLANDBEAR.

This is what I've already done: I'm using field slideshow to make node slideshow (this works as I want it to).

Then I want my image on click to open a bigger image that respects width and height (this part is really confusing).

Can someone give me the right directions or clues? I still haven't found the right ones. Maybe I used the wrong keyword(s) to find them? Right now I'm still using a trial and error approach as in the question How to zoom in an image using jquery?
I have not used the field slideshow module, but if it allows you to select the image style, then you could use the Lightbox2 module http://drupal.org/project/lightbox2. Lightbox 2 is not the only option for displaying the image in an overlay/popup type thing, there are many, here is a comparison of some of them http://drupal.org/node/266126. I just mention lightbox2 specifically as it is the one I usually use.