function doMail(receiver) {
    switch (receiver) {
        case 'victor':
            document.location = 'mail' + 'to:' + 'victor.vanhooijdonk' + '@' + 'vfm.nl';
            break;
        case 'francie':
            document.location = 'mail' + 'to:' + 'francie.coenders' + '@' + 'vfm.nl';
            break;
        case 'iris':
            document.location = 'mail' + 'to:' + 'iris.koster' + '@' + 'vfm.nl';
            break;
        case 'paul':
            document.location = 'mail' + 'to:' + 'paul.plantenga' + '@' + 'vfm.nl';
            break;
        case 'info':
            document.location = 'mail' + 'to:' + 'info' + '@' + 'vfm.nl';
            break;
        default:
            break;
    }
    return false;
}