var d = 0;

function Menu(n){
	if( document.getElementById("m1").className == "active" ) { document.getElementById("m1").className = ""; }
	if(n!=4){
		if( document.getElementById("m"+n).className == "active" ) { Hide(n); return false; }
		Show(n);
		Hide((n == 2) ? 3 : 2);
	}else{
		if( document.getElementById("m"+3).className == "active" ) { Hide(3); return false; }
		Show(3);
	}
	return false;
}

function Show(n){
	document.getElementById("m"+n).className = "active";
	document.getElementById("i"+n).className = "arrow-active";
	document.getElementById("d"+n).style.display = "block";
}

function Hide(n){
	document.getElementById("m"+n).className = "";
	document.getElementById("i"+n).className = "arrow";
	document.getElementById("d"+n).style.display = "none";
}