Dependent Fields

Dependent Fields

Hi,
 
I am currently setting up cases for use but wondered if it was possible to show/hide fields dependant on the type of case being entered?  For example by choosing a 'type' of query ie bug can relevant fields show that wouldnt if query type account issue was selected.
 
I had previously thought that the dependency facility would allow this but now see that that only controls the availability of the dropdown lists
 
Thanks
Lauren