function isReady(form){
  if (isFilled(form.firstname) == false){
    alert("Please enter your first name before submitting the form.");
    form.firstname.focus();
	return false;
  }
  if (isFilled(form.surname) == false){
    alert("Please enter your surname before submitting the form.");
	form.surname.focus();
	return false;
  }
  if (isEmail(form.email) == false){
    alert("Please enter a valid email address before submitting the form.");
	form.email.focus();
	return false;
  }
  if (isFilled(form.cvattach) == false){
    alert("Please select your CV from your PC before submitting the form. DOC, TXT and RTF files are preferred.");
    form.cvattach.focus();
	return false;
  }
  var fileext = Right(form.cvattach.value.toLowerCase(),3)
  if (fileext != "txt" && fileext != "rtf" && fileext != "doc" && fileext != "pdf"){
    alert("Please select a Text file (TXT/RTF) or Word Document (DOC) from your PC.");
	form.cvattach.focus();
	return false;
  }
  return true;
}