function DoRoute() {
    // get values
    var street = document.getElementById('ctl00_BERICHTEN_street_start').value;
    var woonplaats = document.getElementById('ctl00_BERICHTEN_city_start').value;
    var postcode = document.getElementById('ctl00_BERICHTEN_postcode_start').value;

    var url = "http://tools.locatienet.com/location/getroute.asp?config_id=5956&address_stop=417529_5174834_Boomgaardweg_5_3241LA_Middelharnis__NL_5&speedprofile=1&optfactor=90&detailmap=on&language=dutch&street_start=" + encodeURI(street) + "&city_start=" + encodeURI(woonplaats) + "&postcode_start=" + encodeURI(postcode) + "&title=test"

    openedwindow = window.open(url, "route", "location=0,toolbar=0,status=1,resizable=1,scrollbars=1", true);
    //openedwindow.document.write
}