function DoConfirm(message, url) {
  if(confirm(message)) location.href = url;
}

function validate(frm) {
  err='';
  if(frm.theme_id.value=='0') {
    err+='- Please choose a theme\n';
  }
  if(frm.start_time.value=='') {
    err+='- Please enter a start time\n';
  }
  if(frm.end_time.value=='') {
    err+='- Please enter an end time. If you don\'t know the correct timestamp, enter \'0:00\'\n';
  }
  if(err!='') {
    window.alert(err);
  }
  return(err=='')
}