triple comboboxes

hi
how do i make triple combo boxes
like if one combobox is selected, the other two automatically changes w.r.t the first one...
pls help
serious help needed
bye
thnx in advance

Do you want the options in them to change when the value of the first changes?

I'm not understanding what you're asking.

hi The Hobo
thnx for ur time
I need to change the data of the two comboboxes dynamically...
for eg....
I have a combobox like this
<select name="example" multiple size=4>
one combo box has values...."Software","Hardware","Sales" etc
now if the user selects "Software" then the second comboxbox holds the value
"Client/Server Tech","Ecommerce/Intranet","Datacom"
and the third combobox has value a "Fresher","Trainer","Programmer"
similarly for the second values for the first combo box...
hope it was clear..
waiting for
your reply...