function toggleElementDisplay(element_id, is_dialog) {
  /*alert('called toggle dialog')*/
  the_element = document.getElementById(element_id);
  /*the_dialog_bg = document.getElementById('dialogFullWindowBG');*/
  /*alert(the_element.style.display)*/
  if(the_element.style.display == 'none' || the_element.style.display == '') {
    the_element.style.display = 'block';
    /*if (is_dialog == 'true') {
      the_dialog_bg.style.visibility = 'visible';
    }*/
  } else {
    the_element.style.display = 'none';
    /*if (is_dialog == 'true') {
      the_dialog_bg.style.visibility = 'hidden';
    }*/
  }
}