At some point intime your gonna need to narrow down selections for your users. For example select car make [ toyota ] in the first select box and the second selectbox options are narrowed down to only toyota vehicles. Get my drift right. the files needed for this script are attached below and is done in its simplest for. You can apply the concept to larger scale projects.

Files Included
ddsbox.rar
common.js
functions.php
ddsbox.php
DynamicOptionList.js2. quickqoute.sql.zip
quickqoute.sqlInstructions

unzip quickqoute.sql.zip and run the sql file in your mysql client eg. phpmyadmin or mysql console for some linux users who wanna do play tough.

unzip ddsbox.rar and paste folder in localhost directory "generally www in apache"

browser to ddsboxtext.php through localhost server should be or reseble this in your addres bar

"http://localhost/ddsbox/ddsboxtest.php".

Update: heh he.. i didn't upload the files when i made this post.. sorry. its things like this why i should sleep at night.