function isAlphabet(elem, helperMsg){
	var alphaExp = /^[a-zA-Z ]+$/;
	if(elem.value.match(alphaExp)){
		return true;
	}else{
		alert(helperMsg);
		elem.focus();
		return false;
	}
}

function emailValidator(elem, helperMsg){
	var emailExp = /^[\w\-\.\+]+\@[a-zA-Z0-9\.\-]+\.[a-zA-z0-9]{2,4}$/;
	if(elem.value.match(emailExp)){
		return true;
	}else{
		alert(helperMsg);
		elem.focus();
		return false;
	}
}

function isEmpty(elem, helperMsg){
	if(elem.value.length == 0){
		alert(helperMsg);
		elem.focus(); // set the focus to this input
		return false;
	}
	return true;
}

function formValidator(){
	// Make quick references to our fields
	var name    = document.getElementById('fullname');
	var subject = document.getElementById('subject');
	var email   = document.getElementById('email');
	var comment = document.getElementById('comment');

	// Check each input in the order that it appears in the form!
	if(isAlphabet(name, "Please enter only letters for your name"))
	{
		if(emailValidator(email, "Please enter a valid email address"))
		{
			if(isAlphabet(subject, "Please Choose a Subject"))
			{
				if(isEmpty(comment, "Please enter a comment"))
				{
					return true;
				}
			}
		}
	}

	return false;
}

function formValidatorFriend(){
	// Make quick references to our fields
	var name    = document.getElementById('fullname');
	var email   = document.getElementById('email');

	// Check each input in the order that it appears in the form!
	if(isAlphabet(name, "Please enter only letters for your name"))
	{
		if(emailValidator(email, "Please enter a valid email address"))
		{
			return true;
		}
	}

	return false;
}