function showFoto(nummer)
{		
	hideAlles();
	
	var obj = document.getElementById('roulatie_'+nummer);
	
	obj.style.display = 'block';	
}

function hideFoto(nummer)
{
	var obj = document.getElementById('roulatie_'+nummer);
	
	if(obj.style.display != 'none')
		obj.style.display = 'none';	
}


function hideAlles()
{	
	for (var x = 0; x < 20; x++)
	{
		var obj = document.getElementById('roulatie_'+x);
		if(obj) {
			if(obj.style.display != 'none')
				obj.style.display = 'none';
		}
	}		
}