// onChange Event Handler does not work for option elements in IE
function changeVisibilitySelect() {
  if(document.forms[1].enrolnoofstudents.value == '0') {
    document.getElementById('podclass_enrolcountdown_div').style.display='none';
  } else {
    document.getElementById('podclass_enrolcountdown_div').style.display='';
  }

}

//display/hide the correct tr
function changeShareForm(trname) {
  //hide all
  document.getElementById('podclass_share_url').style.display='none';
  document.getElementById('podclass_share_share').style.display='none';
  document.getElementById('podclass_share_embed').style.display='none';
  //set called visible
  document.getElementById(trname).style.display='';
}

function clearEmail() {
  document.getElementById('email1').value = '';
  document.getElementById('email2').value = '';
}