Trying to set Group perm ability on vehicle

Any help would be appreciated, new scriptor here.....LOL. Trying to get script to recognize either the owner or anyone in the group that the vehicle is set to, so that they and only they can drive the vehicle. Works fine for the owner now but group members still cant drive. The following is the decision tree I am trying to use....

Global setting of ....ingroup = TRUE

changed(integer change)
{
if (change & CHANGED_LINK)
{

key user = llAvatarOnSitTarget();
key objectowner;

if (user)

{
group = llDetectedGroup(0);
user = llDetectedKey(0);
objectowner = llGetOwner();


if ((user == objectowner)||(group && ingroup))
{
// You sit and are permitted so get controls
llSetStatus(STATUS_PHYSICS, TRUE);
llSetStatus(STATUS_ROTATE_X | STATUS_ROTATE_Y | STATUS_ROTATE_Z, TRUE);
llRequestPermissions(user,PERMISSION_TAKE_CONTROLS);

}
else
{
llSay(0, "Sorry, You do not have permission to drive";
llUnSit(user);
llPushObject(user, <0,0,1>, ZERO_VECTOR, FALSE);
}
}


This is only the section for permissions, and as I said it works fine for the owner but....
anyone else in group or not is being allowed to sit with no push, and still getting the "Sorry mesage". I know i must have a logic error or something but any help would sure be welcome. Thx in advance!

Replace group && ingroup with llSameGroup(user)
Then set the object's group to your group.

Thanks Jesse, will check it out right away.

Hmm. Also, I don't think you can use the 'llDetected...()' functions from the 'changed' event handler. As far as I know they only work for touch, collision, and sensor event handlers.

Unfortunately it didnt work, and i also tried to use llSameGroup(objectowner) which seemed more appropriate to me but it still didnt work, still fall thru to the Sorry Msg and still dont get unsat or pushed. Any more ideas??

If I cant detect the Group or the User ID, what other way can I make this determination for permissions. I'm stumped!

llDetected* does not work in the changed() event.

changed(integer change)
 {
 	if (change & CHANGED_LINK)
 	{
 		
 		key user = llAvatarOnSitTarget();
 			
 		if ((user == llGetOwner()) || llSameGroup(user))
 		{
 			// You sit and are permitted so get controls
 			llSetStatus(STATUS_PHYSICS, TRUE);
 			llSetStatus(STATUS_ROTATE_X | STATUS_ROTATE_Y | STATUS_ROTATE_Z, TRUE);
 			llRequestPermissions(user,PERMISSION_TAKE_CONTROLS );
 			
 		}
 		else
 		{
 			llSay(0, "Sorry, You do not have permission to drive");
 			llUnSit(user);
 			llPushObject(user, <0,0,1>, ZERO_VECTOR, FALSE);
 		}
 	}
 } 

Wonderful, that did it! Thanks so much for you assistance everyone, and Jillian you are responsible for making my whole week end!!!!!! TY so much!

How would you change this to allow "anyone" to ride?