function goSearch() {
  // catch empty search
  var nonEmpty = /\w+/;
nonEmpty.test(document.searchbox.qt.value);
  if(!nonEmpty.test(document.searchbox.qt.value)) {
     alert('Please supply a search term.');
         return;
  }
  // NOTE: Replace www.bu.edu/your-site-here <http://www.bu.edu/your-site-here>  in the declaration below
  // with the actual web address to your site
   if (document.searchbox.q[0].checked) {
      var searchurl="http://search.bu.edu/dept/query.html?qp=url:www.bu.edu/sargent&qt="+document.searchbox.qt.value+"&col=main";
          }
   if (document.searchbox.q[1].checked) {
      var searchurl="http://www.bu.edu/phpbin/webph/index.php?search_for="+document.searchbox.qt.value;
          }
         window.location.href = searchurl;
         return false;
}