$(document).ready(function(){
	//global vars
	var form = $("#customForm2");
	var name = $("#name");
	var nameInfo = $("#nameInfo");
	var email = $("#email");
	var emailInfo = $("#emailInfo");
	var telephone = $("#telephone");
	var telephoneInfo = $("#telephoneInfo");
	
	//On blur
	name.blur(validateName);
	email.blur(validateEmail);
	telephone.blur(validateTelephone);
	
	//On key press
	name.keyup(validateName);
	telephone.keyup(validateTelephone);
	
	//On Submitting
	form.submit(function(){
		if(validateName() & validateEmail() & validateTelephone())
			return true
		else
			return false;
	});
	
	//validation functions
	function validateEmail(){
		//testing regular expression
		var a = $("#email").val();
		var filter = /^[a-zA-Z0-9]+[a-zA-Z0-9_.-]+@[a-zA-Z0-9]+[a-zA-Z0-9.-]+[a-zA-Z0-9]+.[a-z]{2,4}$/;
		//if it's valid email
		if(filter.test(a)){
			email.removeClass("error");
			emailInfo.text("");
			emailInfo.removeClass("error");
			return true;
		}
		//if it's NOT valid
		else{
			email.addClass("error");
			emailInfo.text("Please type a valid e-mail address");
			emailInfo.addClass("error");
			return false;
		}
	}

	function validateName(){
		//if it's NOT valid
		if(name.val().length < 1){
			name.addClass("error");
			nameInfo.text("Please enter your surname.");
			nameInfo.addClass("error");
			return false;
		}
		//if it's valid
		else{
			name.removeClass("error");
			nameInfo.text("");
			nameInfo.removeClass("error");
			return true;
		}
	}
	
	function validateTelephone(){
		//if it's NOT valid
		if(telephone.val().length < 1){
			telephone.addClass("error");
			telephoneInfo.text("Please enter your phone number.");
			telephoneInfo.addClass("error");
			return false;
		}
		//if it's valid
		else{
			telephone.removeClass("error");
			telephoneInfo.text("");
			telephoneInfo.removeClass("error");
			return true;
		}
	}
});