function checa_origem_destino(){
	if (document.getElementById('aux_origem').value == '')
		document.getElementById('aux_origem').value = document.getElementById('origem').value;
		
	if (document.getElementById('aux_destino').value == '')		
		document.getElementById('aux_destino').value = document.getElementById('destino').value;
}

function submeter(tipo){
  document.getElementById('buscarpreco').value = tipo;
	document.frmWts.submit();	
}

function ida_volta(){
	if (document.getElementById('idaEVolta_true').checked)
		document.getElementById('to').disabled = false;
	else
		document.getElementById('to').disabled = true;
}

function verifica_form(tipo) {
	for (var i = 0; i < document.frmWts.elements.length; i++) {
		if ( (document.frmWts.elements[i].title.substr(0,1)) == "*" ) {	
			if (document.frmWts.elements[i].value == "") {
				if (document.frmWts.elements[i].name == "dataVolta"){
					if (document.getElementById('idaEVolta_false').checked){
						break;
					}
				}
				alert("O campo "+document.frmWts.elements[i].title.substr(1,(document.frmWts.elements[i].title.length))+" é de preenchimento obrigatório.");
				document.frmWts.elements[i].style.backgroundColor = "#ffffcc"; 
				document.frmWts.elements[i].focus();
				return false;
				break;
			}
			else {
					document.frmWts.elements[i].style.backgroundColor = "#efefef";
			}
		}
	}

	checa_origem_destino();
	document.getElementById('buscarpreco').value = tipo;
	document.frmWts.submit();	
	return true;		
}