function validateForm() {
  form = window.document.FeedbackSubmit;
  //check user has specified an email address
  if (form.Email.value == "") {
  alert("Please specify your Email Address");
	form.Email.focus();
	return false;
	}
  //check email is valid
  var emailAddress = form.Email.value;
  var filter = /^.+@.+\..{2,4}$/; // format of a valid email address
  if (!filter.test(emailAddress)) {
	alert("Please specify a valid Email Address");
	form.Email.focus();
	return false;
  }
  return true;
}


function showPic (whichpic, placeholder) {
 if (document.getElementById) {
  document.getElementById(placeholder).src = whichpic.href;
  return false;
 } else {
  return true;
 }
}