[jQuery] Transition on class change

[jQuery] Transition on class change


Is there a ptreferred method to animate a class change transition?
Essentially the effect we are trying to achieve is as follows:
<div class="50pxTall"></div> <-- When this div is clicked the class
name changes to 300pxTall (and the height is adjusted accordingly) -
we would like to have that animated in kind of a slide up/slide down
functionality.
So, the core question is: can animations be done on class name changes
- or should the class height be modified?
And what plugin is good for this effect?
Thanks much!