Two jump menus, one page

[marynorn]

I'm designing a page to report repairs on-line. There are around 100 repairs, so I'm using one dynamic form (php). What I'd like to have is a page with two menus, one active with a list of repair types (eg: plumbing, electrical, glazing, etc) and one that is inactive and greyed out until a repair type has been selected.

For example:

A tenant would click on 'plumbing' from the first menu, the second menu would then become active and populate with plumbing repairs, and the tenant could then select 'leaking showerhead' or 'cracked pipe'. This info would then be used to generate the repair request form.

I can already do this in two stages. Eg: a single jump menu to url/repairs.php?plumbing which has the second menu. However, I'd prefer not to have a page load in the middle of the process gumming up the works.

[boogyman]

twey has a dynamic form handler but I forgot the address.