function formValidator(){
	// Make quick references to our fields
	var name = document.getElementById('name');
	var email = document.getElementById('email');
	var comment = document.getElementById('comment');
	
	// Check each input in the order that it appears in the form!
	if(isEmpty(name, "Please enter your name")){
		if(emailValidator(email, "Please enter a valid email address")){
			if(isEmpty(comment, "Please enter your comment")){
				return true;
			}
		}			
	}
	
	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 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;
	}
}