var display_cv = "block"; 
   function switchDetail(id) {
      var el = document.getElementById(id)
      if ( el.style.display != "none" ) {
         el.style.display="none";
      }
      else {
         el.style.display="block";
      }
   }


/* filter functions for Roadshow, Calendar, Conferences Pages */
  function filter_by_timeselect() {
    var class1 = document.getElementById('timeselect').value;
    var elements = document.getElementsByClassName('calendar');
    for (i = 0; i<elements.length; i++) {
      if (Element.hasClassName(elements[i], class1)) {
        Element.removeClassName(elements[i], 'hidden');
      } else {
        Element.addClassName(elements[i], 'hidden');
      }
    }
  }