helpme!

[CheiN]

function enterVehicle( theVehicle, seat, jacked) 
    local vh = getPedOccupiedVehicle ( source ) 
    vehicles = { [541, 506, 603, 423, 411, 536, 500, 582, 495, 562, 560, 480, 429, 502, 402, 488, 601, 487, 424, 471] } 
    nm = tonumber ( math.random( #vehicles ) ) 
    setElementModel ( vh, nm )   
end)  
addEventHandler("onPlayerVehicleEnter", enterVehicle, setElementModel) 
  

the thing is: i want if a player is in the vehicle Sethim a Random car if im bad correctme plz..

[TAPL]

vehicles = {541, 506, 603, 423, 411, 536, 500, 582, 495, 562, 560, 480, 429, 502, 402, 488, 601, 487, 424, 471} 
  
function enterVehicle(veh, seat, jacked) 
     local nm = math.random(#vehicles) 
     setElementModel(veh, nm)   
end 
addEventHandler("onPlayerVehicleEnter", root, enterVehicle)