function navi(obj) {
 url = obj.options[obj.selectedIndex].value;
 if(url != "") {
   location.href = url;
  }
}

function openwin(url) {
 w = window.open(url, 'win','width=360,height=315,status=no,scrollbars=no,directories=no,menubar=no,resizable=no,toolbar=no');
}