function doShowInfo(showID, stap) {
                location.href = 'http://www.projectascreens.be/pages/index.php?taalCode=DE&subgroep=&action=&rID=' + document.form1.rID.value + '&showID=' + showID + '&' +stap + '=' + showindex(stap);
            }

            function showindex(group) {
                eg = document.getElementsByName(group);
                for (i=0; i<eg.length; i++) {
                    if (eg.item(i).checked) {
                        return eg.item(i).value;
                    }
                }
            }