actually I planned to do some custom work in shipping page. i would like to make a drop down menu to offer some sub-locations options for customer to choose. so I decided to use the "comment section" column instead of creating a new column in the database table. I would like to know how to pass the information from the drop down menu to the comment section. e.g example of desired forms like in this link:
http://www.w3schools.com/jsref/tryit.asp?filename=tryjsref_radio_checked4when the customer hits "send order" then it will be submitted to the "comment" section.
I know the form action for shipping occurs in shipping.php in controller and shipping.tpl(for layout). I am confused on how these two components links to each other.
thanks.