CiviCRM Community Forums (archive)

I've spent several hours pouring through the documentation and the forums looking for examples of how to implement the following.  I have not been able to find a solution, but it seems like a basic feature many sites would want. I'm hoping one of you could point me to an example to work from.

I want to restrict the logged in CiviCRM user to be allowed to only register members of their Household for an Event.  My registration form right now has First and Last name as input fields on the participant profile. 

I understand that there is an auto-complete feature that I might be able to use which will look for possible matches as they start to type into the First Name field.   I've come to a deadend researching this option due to the following roadblocks:

1) This auto-complete feature seems to use an Ajax interface, but I can't find any reference for how to use/access this Ajax interface from a CiviCRM-Joomla install.  Where is the CivicCRM-Joomla ajax interface documented or located in the installed code?

2) Once I find the ajax interface, how do I query through it to return only members of the existing user's household. I see some examples of how to query organizations, but none on user's household contacts.  Is there any documentation for this type of query?

Any help pointing me to the proper documentation/examples would be appreciated. This seems like a very basic feature that many sites would want.

Here's my platform info:
- Joomla 1.6.1
- CiviCRM 4.0.4


Thanks, Kath