function submitMailingPreferences(event) {
    if (!isValidEmail($('email').value)) {
      alert('Please enter a valid email address');
      event.preventDefault();
      return;
    }
   
    if ($('title').value.length < 1) {
      alert('Please choose a title from the Title list');
      event.preventDefault();
      return;
    }
    if ($('firstName').value.length < 1 ) {
      alert('Please enter your first name' );
      event.preventDefault();
      return;
    }
    if ($('lastName').value.length < 1 ) {
      alert( 'Please enter your last name' );
      event.preventDefault();
      return;
    }
    if ($('preferredname').value.length < 1 ) {
      alert( 'Please enter your preferred name' );
      event.preventDefault();
      return;
    }
    
	$('fullName').value = $('title').value + ' ' + $('firstName').value + ' ' + $('lastName').value;
}

function initialiseMailingPreferences() {
	$('subscribeForm').observe('submit',submitMailingPreferences); 
}

document.observe("dom:loaded", initialiseMailingPreferences);