Based on first drop value 2nd drop get filled,and based 2nd drop down 3rd drop value to set default?

Hi Team,

I have created 3 AET fields and generated Drop down.If user select first drop down value 2nd drop value get filled,if user selects second drop down value 3rd drop value to set default.

So how to do it.for this i have implemented get_v method first field, and i have created event handler for first field.So could you please share any sample code for implementing.Could you please help ..i will appreciate any sample code share..

Thanks in advance.

Thanks

Kalpana