Show/hide category selector

Avg Bid (USD)
Project Budget (USD)
$30 - $30

Project Description:
Visit Once you visit above link, click on "Product Category" dropdown from here i want the same stuff as it is there is no change it may be select menu (or) a textbox but once user selects the data should be filled in that. Once user submits email will go to admin.

Attached is plain/sample html. Please note the categories will be added dynamic from database.

Preferred bids who can deliver in 2hours. Fixed budget is 30$.

Skills required:
Javascript, jQuery / Prototype
Additional Files: index.html
About the employer:
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$ 30
in 3 days
Hire cagatayoncul
$ 30
in 1 days
$ 30
in 1 days