function submitEmailForm(elem){
  var emailForm = $(elem);
  
  if (emailForm.name.value == '' || emailForm.email.value == '' || emailForm.body.value == '') {
    alert('Name, email, and body are required.');
    return false;    
  } else {
    var params = Form.serialize($('emailForm'));
    new Ajax.Updater('email','mail.php',{method: 'post', parameters: params}); 
  }
}