Javascript questions

Hey there Kirupans!

Take a look at this: http://www.wirelessinteractive.com/cbtest.php

I’m creating a small application that builds cables for customers to order online. I have a quick question about the functionality, however.

The middle drop down box in each row represents a “Cable Type.” I need to make sure than when “CAT5” is selected in the 2nd drop down, that the other drop downs reset back to “-----” and gray themselves out so they cannot be changed.

How could I accomplish this?

Thanks in advance everyone! Cheers!