/**
 * @desc   Show or hides id, dependig on current state
 * @param  id
 * @return void
 */
function showHideID(id)
{
	element = document.getElementById(id);

	if (element.className == 'visible')
	{
		element.className = 'invisible';
	}
	else
	{
		element.className = 'visible';
	}
}



/**
 * @desc   Hides id
 * @param  id
 * @return void
 */
function hideID(id)
{
	element = document.getElementById(id);
	element.className = 'invisible';
}



/**
 * @desc   Shows id
 * @param  id
 * @return void
 */
function showID(id)
{
	element = document.getElementById(id);
	element.className = 'visible';
}