function changeMerk(merk) {
            //zet label
            document.getElementById('divMerk').innerHTML = merk;
            //var merk = document.getElementById('SelectMerk').value;
            var selectType = document.getElementById('SelectType');
            //clear
            selectType.options.length = 0;
            //voeg lege waarde toe
            //selectType.options[1] = new Option('', '', true, false));
            selectType.options[0] = new Option('', '', true, false);
            //voeg waardes toe per type
            if (merk == 'Aqualina') {
                selectType.options[1] = new Option('T1/T2', '2', false, false);
                selectType.options[2] = new Option('T3', '3', false, false);
                selectType.options[3] = new Option('T4', '4', false, false);
                selectType.options[4] = new Option('T5', '5', false, false);
                selectType.options[5] = new Option('T6', '6', false, false);
            }
            else if (merk == 'Stretch Top') {
                selectType.options[1] = new Option('0%', '1', false, false);
                selectType.options[2] = new Option('60%', '2', false, false);
                selectType.options[3] = new Option('80%', '3', false, false);
                selectType.options[4] = new Option('100%', '4', false, false);
                selectType.options[5] = new Option('100%+', '5', false, false);
                selectType.options[6] = new Option('120%', '6', false, false);
            }
            else if (merk == 'Poseidon') {
                selectType.options[1] = new Option('P400', '2', false, false);
                selectType.options[2] = new Option('P600', '3', false, false);
                selectType.options[3] = new Option('P650', '3', false, false);
                selectType.options[4] = new Option('P800', '4', false, false);
                selectType.options[5] = new Option('P750', '4', false, false);
                selectType.options[6] = new Option('P950', '5', false, false);
                selectType.options[7] = new Option('P1250', '6', false, false);
                selectType.options[8] = new Option('Ultramax', '5', false, false);
            }
            else if (merk == 'Baltimore') {
                selectType.options[1] = new Option('Ongestabiliseerd', '1', false, false);
                selectType.options[2] = new Option('3000', '2', false, false);
                selectType.options[3] = new Option('5000', '3', false, false);
                selectType.options[4] = new Option('8000', '4', false, false);
                selectType.options[5] = new Option('10000', '5', false, false);
                selectType.options[6] = new Option('12000', '6', false, false);
            }
            else if (merk == 'Halcyon') {
                selectType.options[1] = new Option('F0', '1', false, false);
                selectType.options[2] = new Option('F4', '2', false, false);
                selectType.options[3] = new Option('F6', '3', false, false);
                selectType.options[4] = new Option('F8', '4', false, false);
                selectType.options[5] = new Option('F10', '5', false, false);
                selectType.options[6] = new Option('F12', '6', false, false);
            }
            else if (merk == 'Cascade') {
                selectType.options[1] = new Option('Gestabiliseerd', '2', false, false);
                selectType.options[2] = new Option('Max. Gestabiliseerd', '3', false, false);
                selectType.options[3] = new Option('Super Gestabiliseerd', '4', false, false);
                selectType.options[4] = new Option('Ultra Gestabiliseerd', '5', false, false);
            }
            else if (merk == 'Delfin') {
                selectType.options[1] = new Option('Licht', '2', false, false);
                selectType.options[2] = new Option('Midden', '3', false, false);
                selectType.options[3] = new Option('Zwaar', '4', false, false);
            }
            else if (merk == 'Vitenzo') {
                selectType.options[1] = new Option('Ocean', '1', false, false);
                selectType.options[2] = new Option('Wave', '2', false, false);
                selectType.options[3] = new Option('Sand', '4', false, false);
                selectType.options[4] = new Option('Beach', '5', false, false);
                selectType.options[5] = new Option('Rock', '6', false, false);
            }
            else if (merk == 'Makro') {
                selectType.options[1] = new Option('Aurora', '4', false, false);
            }

        }

        function changeType() {
            var type = document.getElementById('SelectType').value;
            var hardsoft = document.getElementById('SelectHardSoft').value;
            var url = '';
            if (hardsoft == 'soft') {
                if (type == '1') {
                    url ='/matrasvergelijker-uitkomst.aspx?GroupID1eaa7ecc-4186-4415-870e-b04c7bafc77a=4719dc96-289d-4165-96fe-45a226c58e72&ItemID1eaa7ecc-4186-4415-870e-b04c7bafc77a=c794a0dc-915d-4752-b726-c5b087cf734e';
                }
                else if (type == '2') {
                    url = '/matrasvergelijker-uitkomst.aspx?GroupID1eaa7ecc-4186-4415-870e-b04c7bafc77a=4719dc96-289d-4165-96fe-45a226c58e72&ItemID1eaa7ecc-4186-4415-870e-b04c7bafc77a=6afcf67b-fae1-4f6c-801a-3ef81db126d8';
                }
                else if (type == '3') {
                    url = '/matrasvergelijker-uitkomst.aspx?GroupID1eaa7ecc-4186-4415-870e-b04c7bafc77a=4719dc96-289d-4165-96fe-45a226c58e72&ItemID1eaa7ecc-4186-4415-870e-b04c7bafc77a=375c5dcd-2964-4357-8492-e5be4c797518';
                }
                else if (type == '4') {
                    url = '/matrasvergelijker-uitkomst.aspx?GroupID1eaa7ecc-4186-4415-870e-b04c7bafc77a=4719dc96-289d-4165-96fe-45a226c58e72&ItemID1eaa7ecc-4186-4415-870e-b04c7bafc77a=34c630e0-f4f2-4c35-8c2a-f71dcb1294b5';
                }
                else if (type == '5') {
                    url = '/matrasvergelijker-uitkomst.aspx?GroupID1eaa7ecc-4186-4415-870e-b04c7bafc77a=4719dc96-289d-4165-96fe-45a226c58e72&ItemID1eaa7ecc-4186-4415-870e-b04c7bafc77a=5f202400-9796-454e-8ecb-7e1338c36bd5';
                }
                else if (type == '6') {
                    url = '/matrasvergelijker-uitkomst.aspx?GroupID1eaa7ecc-4186-4415-870e-b04c7bafc77a=4719dc96-289d-4165-96fe-45a226c58e72&ItemID1eaa7ecc-4186-4415-870e-b04c7bafc77a=aea1ded2-ef8b-4916-8920-79d0294bf40e';
                }
            }
            else if (hardsoft == 'hard') {
                if (type == '1') {
                    url = '/matrasvergelijker-uitkomst.aspx?GroupID1eaa7ecc-4186-4415-870e-b04c7bafc77a=4ade0c7c-b2a0-4d75-8ecc-1847a26ba3fb&ItemID1eaa7ecc-4186-4415-870e-b04c7bafc77a=e452b22b-dd2a-4372-8c14-f417d664cc7c';
                }
                else if (type == '2') {
                    url = '/matrasvergelijker-uitkomst.aspx?GroupID1eaa7ecc-4186-4415-870e-b04c7bafc77a=4ade0c7c-b2a0-4d75-8ecc-1847a26ba3fb&ItemID1eaa7ecc-4186-4415-870e-b04c7bafc77a=676eedaf-18c2-469d-b1a7-ebc8b53877af';
                }
                else if (type == '3') {
                    url = '/matrasvergelijker-uitkomst.aspx?GroupID1eaa7ecc-4186-4415-870e-b04c7bafc77a=4ade0c7c-b2a0-4d75-8ecc-1847a26ba3fb&ItemID1eaa7ecc-4186-4415-870e-b04c7bafc77a=369917d5-ada7-4789-ac56-e9f4effbdcf3';
                }
                else if (type == '4') {
                    url = '/matrasvergelijker-uitkomst.aspx?GroupID1eaa7ecc-4186-4415-870e-b04c7bafc77a=4ade0c7c-b2a0-4d75-8ecc-1847a26ba3fb&ItemID1eaa7ecc-4186-4415-870e-b04c7bafc77a=24548ce7-eeec-4078-aaa1-90ff5746f04b';
                }
                else if (type == '5') {
                    url = '/matrasvergelijker-geenuitkomst.aspx';
                }
                else if (type == '6') {
                    url = '/matrasvergelijker-geenuitkomst.aspx';
                }
            }
            if (url != '') {
                var domainUrl = 'http://dreamzzzshop.twist.nl'
                location.href = domainUrl + url;
                
            }
        }