function checkAanvraag() {
    var fields = new Array("name","title","company_name","company_adress","country","phone_country_code","phone_area_code","phone_number","fax_country_code","fax_area_code","fax_number","emailadres");
    var emptyFields = new Array();
    var emptyFieldsString = '';
    var teller = 0;
    
    for (i = 0; i < fields.length; i++) {
        if(document.getElementById(fields[i]).value == '') {
            emptyFields[teller] = fields[i];
            document.getElementById(fields[i]).style.backgroundColor = '#B1D1E8';
            teller++;
        } else {
            document.getElementById(fields[i]).style.backgroundColor = '#FFFFFF';
        }
    }
    
    if (emptyFields.length == 0) {
        return true;
    } else {
        for(j = 0; j < emptyFields.length; j++) {
            emptyFieldsString = emptyFieldsString + '\n-  ' + emptyFields[j];
        }
        alert('Please fill out the following fields: ' + emptyFieldsString);
        return false;
    }
}

function zetFotos() {
    hoogte = parseInt(document.getElementById('oCMenu0bbar').style.height);
    document.getElementById('onderCoolmenu').style.marginTop = parseInt(hoogte + 150) + 'px';
    document.getElementById('onderCoolmenu').style.visibility = "visible";
}