function toggleDisplay(itemId)
{
	var item = document.getElementById(itemId);

	if (item.className == 'hide') {
		item.className = 'show';		
	}
	else {
		item.className = 'hide';
	}
}

function showElement(itemId)
{
	var item = document.getElementById(itemId);
	item.className = 'show';
}

function showBlockElement(itemId)
{
	var item = document.getElementById(itemId);
	item.className = 'show-block';
}

function hideElement(itemId)
{
	var item = document.getElementById(itemId);
	item.className = 'hide';
}

function swap(imgId, appendix)
{
	var img = document.getElementById(imgId);
	path = img.src.substring(0, img.src.indexOf(imgId));
	img.src = path + imgId + appendix;
}