Auto populate fields based on another field in registration form of jomsocial


We are using jomsocial. we need ajax kind of fields for load dynamically when registering the user  

example : take two fields state and city ..suppose is i selected particular state i am able to view the cities of the state in city field .how it can be done

Thanks & Regards
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ByteridgeAuthor Commented:
Briefly : update field based on another field
ByteridgeAuthor Commented:
first i need how to achieve this
1 - create a new table for cities with a "state" field, good to have a primary key
2 - insert all cities (with their state) in the table
3 - when the user achieve to enter the state (you use the onblur event) you do an ajax call to try to get a list of citie for the state, you can use a dropdown or with jquery an autocomplete object (

So you need :
- ajax page to return an array of cities from a given state
- a javascript to do the ajax call that handle and create options from an array of cities
ByteridgeAuthor Commented:
Jomsocial guys are going to add this functionality in future
..plz refer this url :

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