Impossible?

What I am doing is creating a web based application.  I am very familiar with vbscript and Visual Basic.  This webapp is using asp.
I am looking at creating dynamic dropdowns and I do not want it to refresh the whole page upon selection to populate the next box.  I am seeing java script (which I am very unfamiliar with)  as being the way to go.  The Select Boxes will be populateed with data from a DB and I have done some searching on the internet and I can not find anything close to being what I need it to do.  
 
I want to use VB to pull the data from the database and set it to variables but then use those varibles with java script to populate my dropdown boxes.
 
Any input would help. 
 

http://www.aspkey.net/aspkey/_articles/asp/showarticle.asp?id=100

is an example