function changeSearchSelect( whichBt, whichRadio, whichFrm ) {

objBtAviao = document.getElementById("btAviao")
objBtAviaoHotel = document.getElementById("btAviaoHotel")
objBtHotel = document.getElementById("btHotel")
objBtPacotes = document.getElementById("btPacotes")

objFrmAviao = document.getElementById("searchAviaoContainer")
objFrmAviaoMaisHotel = document.getElementById("searchAviaoMaisHotelContainer")
objFrmHotel = document.getElementById("searchHotelContainer")
objFrmPacotes = document.getElementById("searchPacotesContainer")

// coloca todos os elementos ao estado normal
objBtAviao.className = "searchSelectBtAviao";
objBtAviaoHotel.className = "searchSelectBtAviaoHotel";
objBtHotel.className = "searchSelectBtHotel";
objBtPacotes.className = "searchSelectBtPacotes";
// adiciona 'Active' no nome da class
beta = document.getElementById(whichBt);
beta.className = beta.className + "Active";

// esconde os form
objFrmAviao.style.display = 'none';
objFrmAviaoMaisHotel.style.display = 'none';
objFrmHotel.style.display = 'none';
objFrmPacotes.style.display = 'none';
// activa o form pretendido
alpha = document.getElementById(whichFrm);
alpha.style.display = 'block';

//activa o radio
document.frmSearchSelectMenu.radioSearchSelectMenu[whichRadio].checked = true;
}