def main(arguments={}, path='', *args, **kwargs):
    language = path.startswith('/en/') and 'en' or 'nl'
    query = arguments.get('query', [''])[0]

    nlPath = '/'.join(['nl'] + path.split('/')[2:]) + '?' + urlencode(arguments)
    enPath = '/'.join(['en'] + path.split('/')[2:]) + '?' + urlencode(arguments)

    yield """<div id="header">
    <div id="logo"><a href="http://www.uvt.nl"><img alt="Universiteit van Tilburg" src="/files/uvt_logo.gif"/></a></div>
    <div id="searchbox">
        <form method="get" action="">
            <input type="text" name="query" value="%s"/>
            <input type="submit" value="%s"/>
        </form>
        <a href="/%s">NL</a> | <a href="/%s">EN</a>
    </div>

</div>""" % (query, {'nl':'Zoeken', 'en':'Search'}[language], nlPath, enPath)