imgNumberactivi = -1;
activiteiten_list.sort(function() {return 0.5 - Math.random();});

function swapactivi()
{ 
	imgNumberactivi++;
	
	if (imgNumberactivi > activiteiten_list.length - 1)
	{
		imgNumberactivi = 0
	}
	if (activiteiten_list.length != 0)
	{
		document.getElementById("activiteitenblok").innerHTML = activiteiten_list[imgNumberactivi];
	}
	setTimeout('swapactivi()',6000);
}