function toggle(id, button,  buttontext) 
{
	object = document.getElementById(id);

	if (object.style.display == "block")
	{
		// Display
		object.style.display = 'none';

		button.value = "Vis "+ buttontext;
	}
	else // is hidden -> show
	{
		// Display
		object.style.display = 'block';

		button.value = "Skjul "+ buttontext;
	}
}