var bedr = 4.5;
function bedrag(aantal){
	$('.bedrag').html(toDecimal(aantal*bedr));
}

function toDecimal(number){
	var number = Math.round(number*100).toString();
	number = number.substring(0,number.length-2)+','+number.substring(number.length-2,number.length);
	if(number == 0 || number==',0'){ number = '0,00' };
	return number;
}

function ophalen(el){
	if(el.checked){
		bedr = 3;
		$('#verzendkosten').css('visibility','hidden');
	}
	else {
		bedr = 4.5;
		$('#verzendkosten').css('visibility','visible');
	}
	bedrag( $('select').val() );
}