function openClose()
{	_menu = document.getElementById('menu');
	_submenu = document.getElementById('submenu');
	
	if(_submenu.style.display == 'block')
	{	_menu.className = '';
		_submenu.style.display = 'none';
	}
	else
	{ _menu.className = 'over';
		_submenu.style.display = 'block';
	}

}