/**
 * Show packet layers and hide others
 * 
 * @param  string  element  The element to show
 */
function showPacket(element)
{
	// Hide all elements
	$('beginners').hide();
	$('standaard').hide();
	$('business').hide();
	$('advanced').hide();
	
	// Show the requested packet layer
	$(element).show();
}

function toggleBackground()
{
	if (document.body.className == 'dark') {
		document.body.className = 'light';
	} else if (document.body.className == 'light') {
		document.body.className = '';
	} else {
		document.body.className = 'dark';
	}
}