Flash Banner with 2 combo box selections

Hello,
I’m creating a flash banner ad that will have two combo boxes and a zip code text box. All of which will populate section of the url, once the user has clicked the “submit button”

the url looks like this:
http://www.website.com/combo1/combo2/price-quotes/?id=4&zipcode=textbox3&submit=1

where combo1 is the first selection
combo 2 is the second selection
and textbox3 is the third.

Can anyone help me get started on what the code would look like? I have not touched actionscript in about 4 yrs and I’m really rusty. Any help is much appreciated.