function switchContent(o) {
	for (var i = 0; i < o.childNodes.length; i++)
	{
		var node = o.childNodes[i]
		if (node.className == "footnote-hidden")
		{
			node.className = "footnote-shown"
		}
		eslse
		{
			node.className = "footnote-hidden"
		}
	}
	return false;
}