var current = 0;

function hideSubMenus() {
	
	if ( current != 0 ) {
		
		if ( current == 1 ) {
			document.getElementById("aeroMenu").style.display = "none";
		}
		
		current = 0;
	}
}

function showSubMenu( num ) {
	
	if ( current != num ) {
		
		if ( num == 1 ) {
			document.getElementById("aeroMenu").style.display = "block";
		}
		
		current = num;
		
	} else {
	
		document.getElementById("aeroMenu").style.display = "none";
	
		current = 0;
	}
}