function showHide(id){
	if(document.getElementById('submenu-'+id) != null){
		var	obj = document.getElementById('submenu-'+id);
		
		switch(obj.style.display){
			case 'block':
				obj.style.display = 'none';
			break;
			default:
				obj.style.display = 'block';
		}
		
	}
}