function switchMenu(s) {

	switch(s){
	case 'info':
		if(document.getElementById("body").className
			&& document.getElementById("menuHeaderInformation").lastChild.style.display=="block") return;

		document.getElementById("menuHeaderInformation").lastChild.style.display = "block";
		document.getElementById("menuHeaderExperience").lastChild.style.display = "none";
		document.getElementById("menuHeaderMeeting").lastChild.style.display = "none";
		break;

	case 'exp':
		if(document.getElementById("body").className
			&&	document.getElementById("menuHeaderExperience").lastChild.style.display=="block") return;

		document.getElementById("menuHeaderExperience").lastChild.style.display = "block";
		document.getElementById("menuHeaderInformation").lastChild.style.display = "none";
		document.getElementById("menuHeaderMeeting").lastChild.style.display = "none";
		break;

	case 'meet':
		if(document.getElementById("body").className
			&& document.getElementById("menuHeaderMeeting").lastChild.style.display=="block") return;

		document.getElementById("menuHeaderMeeting").lastChild.style.display = "block";
		document.getElementById("menuHeaderInformation").lastChild.style.display = "none";
		document.getElementById("menuHeaderExperience").lastChild.style.display = "none";
		break;

	default:
		document.getElementById("menuHeaderInformation").lastChild.style.display = "block";
		document.getElementById("menuHeaderExperience").lastChild.style.display = "block";
		document.getElementById("menuHeaderMeeting").lastChild.style.display = "block";
	}

	soundManager.play('menu_ex');

}

function menuInit(){

	document.getElementById("navInformation").onclick = function(){switchMenu('info'); return false;};
	document.getElementById("navExperience").onclick = function(){switchMenu('exp'); return false;};
	document.getElementById("navMeeting").onclick = function(){switchMenu('meet'); return false;};

	document.getElementById("navInformation").onmouseover = function(){soundManager.play('beep');};
	document.getElementById("navExperience").onmouseover = function(){soundManager.play('beep');};
	document.getElementById("navMeeting").onmouseover = function(){soundManager.play('beep');};

	document.getElementById("menuHeaderInformation").firstChild.onclick = function(){switchMenu('info'); return false;};
	document.getElementById("menuHeaderExperience").firstChild.onclick = function(){switchMenu('exp'); return false;};
	document.getElementById("menuHeaderMeeting").firstChild.onclick = function(){switchMenu('meet'); return false;};

	document.getElementById("menuHeaderInformation").firstChild.onmouseover = function(){soundManager.play('beep');};
	document.getElementById("menuHeaderExperience").firstChild.onmouseover = function(){soundManager.play('beep');};
	document.getElementById("menuHeaderMeeting").firstChild.onmouseover = function(){soundManager.play('beep');};

	switchMenu(document.getElementById("body").className);

}