function showForm(type) {
	document.getElementById("air").style.display = "none";
	document.getElementById("hotel").style.display = "none";
	document.getElementById("car").style.display = "none";
	
	var airNavContent = '<a href="#" onclick="showForm(\'air\');return false;">Air</a>';
	var hotelNavContent = '<a href="#" onclick="showForm(\'hotel\');return false;">Hotel</a>';
	var carNavContent = '<a href="#" onclick="showForm(\'car\');return false;">Car</a>';
	
	if (type == "air") {
		document.getElementById("navAir").innerHTML = "Air";
		document.getElementById("navHotel").innerHTML = hotelNavContent;
		document.getElementById("navCar").innerHTML = carNavContent;
		
		document.getElementById("air").style.display = "block";
	}
	else if (type == "hotel") {
		document.getElementById("navAir").innerHTML = airNavContent;
		document.getElementById("navHotel").innerHTML = "Hotel";
		document.getElementById("navCar").innerHTML = carNavContent;
		
		document.getElementById("hotel").style.display = "block";
	}
	else if (type == "car") {
		document.getElementById("navAir").innerHTML = airNavContent;
		document.getElementById("navHotel").innerHTML = hotelNavContent;
		document.getElementById("navCar").innerHTML = "Car";
		
		document.getElementById("car").style.display = "block";
	}
}