function showMenu(menu) {
	switch(menu) {
		case 'buy': {
			swapSubMenu('bfishes_menu');
			swapSubMenu('bplants_menu');
			swapSubMenu('bdecorations_menu');
			swapSubMenu('bbackgrounds_menu');
			swapSubMenu('bgrounds_menu');
			swapSubMenu('baquariums_menu');
			break;
		}
		case 'personal': {
			swapSubMenu('editprofile_menu');
			swapSubMenu('friendlist_menu');
			swapSubMenu('pms_menu');
			swapSubMenu('settings_menu');
			break;
		}
		case 'myprofile': {
			swapSubMenu('myprofile_menu');
			for(i = 0; i < myaquariums.length; i++) {
				swapSubMenu('aquarium'+myaquariums[i]+'_menu');
			}
			break;
		}
	}
}

function swapSubMenu(name) {
	var elem = document.getElementById(name);
	if(elem.style.visibility == 'hidden') {		
		elem.style.visibility = 'visible';
		elem.style.height    = '21px';
	} else {
		elem.style.visibility = 'hidden';
		elem.style.height    = '0px';
	}
}