new Medic=0;
new IsMedic[MAX_PLAYERS];

public OnPlayerStateChange(playerid, newstate, oldstate)
{
    if(newstate==PLAYER_STATE_DRIVER)
    {
        if(GetVehicleModel(GetPlayerVehicleID(playerid)) == 578)
      {
        IsMedic[playerid]=1;
        Medic++;
        SendClientMessage(playerid,0xFFFF00AA,"You can use the ACTION KEY to Tow cars");
        }
        if((newstate==PLAYER_STATE_ONFOOT)&&(IsMedic[playerid]==1))
      {
        IsMedic[playerid]=0;
        Medic--;
      }
        return 1;
    }
    return 0;
}
//------------------------------------------------------------------------------------------------------
public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
    if ((newkeys==KEY_ACTION)&&(IsPlayerInAnyVehicle(playerid))&&(GetPlayerState(playerid)==PLAYER_STATE_DRIVER))
    {
        if (GetVehicleModel(GetPlayerVehicleID(playerid)) == 578)
        {
            new Float:pX,Float:pY,Float:pZ;
            GetPlayerPos(playerid,pX,pY,pZ);
            new Float:vX,Float:vY,Float:vZ;
            new vid=0;
            while((vid<MAX_VEHICLES))
            {
            vid++;
            GetVehiclePos(vid,vX,vY,vZ);
            if((floatabs(pX-vX)<7.0)&&(floatabs(pY-vY)<7.0)&&(floatabs(pZ-vZ)<7.0)&&(vid!=GetPlayerVehicleID(playerid)))
            {
                if(IsTrailerAttachedToVehicle(GetPlayerVehicleID(playerid)))
                {
            DetachTrailerFromVehicle(GetPlayerVehicleID(playerid));
            }
                AttachTrailerToVehicle(vid,GetPlayerVehicleID(playerid));
                }
        }
    }
  }
}
//------------------------------------------------------------------------------------------------------
public OnPlayerDisconnect(playerid)
{
    if  (IsMedic[playerid]==1)
    {
      IsMedic[playerid]=0;
      Medic--;
    }
    return 1;
}