dected if seated

I want to detect if an avatar is seated, and there is one more than seat, is there away to detect if the key is part of the link set? as away of detecting sit target when there are quite a few poseballs?

Id usually use if (llDetectedkey(0) == llAvatarOnSitTarget

Im thinking if the detected key is link number 10 or 11 ona nine prim object means they are seated.. but i just cant work it out.
Please help

Just loop through each link in the linkset from 1 through llGetNumberOfPrims(), testing llGetLinkKey() until you find the match.

But it's not quite clear what you're matching with that link: whence did this llDetectedKey(0) arise? Something like this would work if, for example, this is in a touch_start() handler and the objective is to see whether the agent who touched is also one of the seated agents. But if this bit of code is triggered by a CHANGED_LINK event when some agent sits or stands, there is no llDetectedKey().

thanks!
yes it is a touch_start().

I just wanted to stop people who are not seated getting a dialog menu. A dialog on sit would be kind of annyoing after multpile uses, so I want to make it on touch.

if you know the number of prims in the object and it doesn't change, any number of prims above that will be seated av's... and you'll want to start testing at the link number that equals the number of prims (becuase they number from 0) up to the total count of links - 1, assuming you need to actually get the seated av's keys... otherwise if you just need to know if or how many avs are seated

//-- for a single prim box gPrimCount = 1
integer gPrimCount = 1;
integer gAvCount;

default(){
  changed ( integer vBitChanges ){
    if ( CHANGED_LINK & vBitChanges ){
      gAvCount = llGetNumberOfPrims() - gPrimCount;
      llSay (0, "there are " + (string)gAvCount + " avs sitting on me");
      if (gAvCount){ //-- greater than 0
        llSay( 0, "Their names are...." );
        integer vAvNum;
        for ( vAvNum = gPrimCount -1, vAvNum < gPrimCount + vAvCount, ++vAvNum){
          llSay( 0, llKey2Name( llGetLinkKey( vAvNum ) );
        }
      }
    }
  }
}

note: not checked for syntax, but that should give you the basis

I recently (last 6 months?) that llGetNumberOfPrims and llGetObjectPrimCount return different values, the latter does not count avatars.

http://wiki.secondlife.com/wiki/llGetNumberOfPrims

integer GetNumberOfAgents()
{//count avatars
    return llGetNumberOfPrims() - llGetObjectPrimCount(llGetKey());
}

thankyou so much for this
very helpful