function incl_btw_berekenen() {
	var check = document.getElementById('bedrag_excl');
	var thisNew = document.getElementById('new'); 	
	var thisNewValue = thisNew.innerHTML; 	
	var btw = 1.19;
	var resultaat = 0.00;
	resultaat = check.value * btw;
	resultaat = Math.round(resultaat * 100) / 100;
	thisNew.innerHTML = '€ ' + resultaat;
}

function excl_btw_berekenen() {
	var check = document.getElementById('bedrag_incl');
	var thisNew = document.getElementById('new'); 	
	var thisNewValue = thisNew.innerHTML; 	

	thisNew.innerHTML = '€ ' + resultaat;
}

function hover(nummer, categorie_id){
	var ophalen = document.getElementById('vlak_' + nummer).innerHTML;
	var naar = document.getElementById('foto_' + categorie_id);
	naar.innerHTML = ophalen;
}