/* Toggle visibility of elements */

function showhidediv(shelementid) {
  var obj = null;
  if(document.getElementById) {
    obj = document.getElementById(shelementid);
    if( obj ) {
      if (obj.style.visibility == 'visible'){
        obj.style.visibility = 'hidden';
        obj.style.height = 0;
      } else {
        obj.style.visibility = 'visible';
        obj.style.height = '';
      }
    }
  }
}