AJAX conditional filters

Very simple. I have... 1. A table of a mysql database with 4 fields. 2. The table contains many entries, some of which are repeated. I need... 1. 4 filters in the form of 4 drop-down lists. Drop-down list 1 populated by [unique values] of field 1, dd list 2 with field 2 etc. 2. Selected option in 1st drop-down, constrains the items in 2nd drop-down to be filtered such that field 1 = selected option 1. 3rd drop-down conditional on 2nd and 4th on 3rd. 4 consecutive filters! This must be done with AJAX as I do not want page to refresh between each filter choice. 2nd filter must only be available if a specific value in 1st filter is NOT chosen. I know that scripts already exist to do this, but they use iframes, which I do not want. For someone who understands AJAX this should be pretty quick! Thanks! ## Deliverables 0) Complete and full understanding of the English language to allow for clear communication at all times. 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform win xp pref