function expandSubmenu(submenuId, submenuClass, parentId)
{
	parentElement = $(parentId);
	submenuElement = $(submenuId);
	for (var i = 0; i < parentElement.childNodes.length; i++)
	{
		if (parentElement.childNodes[i].id == submenuId)
		{
			if (submenuElement.style.display == 'none')
				submenuElement.style.display = '';
			else
				submenuElement.style.display = 'none';
		}
		else if (parentElement.childNodes[i].className == submenuClass)
			parentElement.childNodes[i].style.display = 'none';
	}
}