// JavaScript Document
function formValidator(){
	// Make quick references to our fields
	var name = document.getElementById('name');
	var email = document.getElementById('email');
	var phone = document.getElementById('phone');
		
	
	// Check each input in the order that it appears in the form!
	if(isAlphabet(name, "Please enter your name using only letters")){
		if(emailValidator(email, "Please enter a valid email address")){
			if(phoneValidator(phone, "Please enter a valid telephone number")){
				return true;
						}
					//}
				//}
			//}
		}
	}
	
	
	return false;
	
}

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

function isNumeric(elem, helperMsg){
	var numericExpression = /^[0-9]+$/;
	if(elem.value.match(numericExpression)){
		return true;
	}else{
		alert(helperMsg);
		elem.focus();
		return false;
	}
}

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

function isAlphanumeric(elem, helperMsg){
	var alphaExp = /^[0-9a-zA-Z]+$/;
	if(elem.value.match(alphaExp)){
		return true;
	}else{
		alert(helperMsg);
		elem.focus();
		return false;
	}
}

function lengthRestriction(elem, min, max){
	var uInput = elem.value;
	if(uInput.length >= min && uInput.length <= max){
		return true;
	}else{
		alert("Please enter between " +min+ " and " +max+ " characters");
		elem.focus();
		return false;
	}
}

function madeSelection(elem, helperMsg){
	if(elem.value == "Please Choose"){
		alert(helperMsg);
		elem.focus();
		return false;
	}else{
		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;
	}
}

function phoneValidator(elem, helperMsg){
	var phoneExp = /^\(?\d{3}\)?\s|-\d{3}-\d{4}$/;
	var phoneExpB = /000+/;
	if (elem.value.match(phoneExpB)){
		alert(helperMsg);
		elem.focus();
		return false;
	}else if (elem.value.match(phoneExp)){
		return true;
	}else{
		alert(helperMsg);
		elem.focus();
		return false;
	}
}