Linking Three Dropdowns

Dynamically update dropdown lists based on other dropdowns using JavaScript

Updating a second dropdown's content based on a user selection in a first dropdown is a common requirement. Of course having figured out how to do that everyone then wants to know how to extend that functionality to update a third dropdown based on the selection in the second one. Here's how to amend the code from my dynamic dropdown script to add a third dropdown. The same principal can of course then be applied in order to add even more dropdowns if required.

Linking Three Dropdowns