Locking Intermediate Picture Size?

[raynedanser]

I have some pictures that are quite large. Is it possible to lock the size on the intermediate page to "x" size (say 500 pixels wide and then if the picture is LARGER, have it clicked on again to have the full size pop up?

link: http://www.mattschulze.info/copper/index.php

Thanks!

[Nibbler]

That already happens.