scrape addresses from two Ajax sites

we need a list of addresses from two Ajax web sites that allow looking up addresses by ZIP code and place name. steps involved: - analyze the JavaScript code of the sites - rewrite the code to allow posting ZIP codes in a loop, piping names, streets, numbers and ZIP codes to a comma-delimited flat file on disk.  there will be about 4000 distinct addresses per web site with lots of doubles (identical addresses being generated for several ZIP codes) so there will be something like 50000 records in each of the two files. - double entries can be removed from the files (we are however able do that ourselves) - we will supply the ZIP codes in a flat file format.   - we require a copy of the code you write or generate and documentation of the techniques you use. the crucial skill needed and lacking in our organisation: javascript development, specifically piping a large quantity of data from a web site to a file on disk. we have this kind of job available every couple of months so there may be repeat orders.