$(document).ready(function(){
	//global vars
	var form = $("#contact");
	var name = $("#FirstName");
	var nameInfo = $("#nameInfo");
	var surname = $("#Surname");
	var surnameInfo = $("#surnameInfo");
	var email = $("#Email");
	var emailInfo = $("#emailInfo");
	var telephone = $("#Phone");
	var telephoneInfo = $("#telephoneInfo");
	var postcode = $("#Postcode");
	var postcodeInfo = $("#postcodeInfo");
	
	//On blur
	name.blur(validateName);
	surname.blur(validateSurname);
	email.blur(validateEmail);
	telephone.blur(validateTelephone);
	postcode.blur(validatePostcode);

	//On key press
	name.keyup(validateName);
	surname.keyup(validateSurname);
	telephone.keyup(validateTelephone);
	postcode.keyup(validatePostcode);
	
	//On Submitting
	form.submit(function(){
		if(validateName() & validateSurname() & validateEmail() & validateTelephone() & validatePostcode())
			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");
			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 name.");
			nameInfo.addClass("error");
			return false;
		}
		//if it's valid
		else{
			name.removeClass("error");
			nameInfo.text("");
			nameInfo.removeClass("error");
			return true;
		}
	}
	
	function validateSurname(){
		//if it's NOT valid
		if(surname.val().length < 1){
			surname.addClass("error");
			surnameInfo.text("Please enter your surname.");
			surnameInfo.addClass("error");
			return false;
		}
		//if it's valid
		else{
			surname.removeClass("error");
			surnameInfo.text("");
			surnameInfo.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.");
			telephoneInfo.addClass("error");
			return false;
		}
		//if it's valid
		else{
			telephone.removeClass("error");
			telephoneInfo.text("");
			telephoneInfo.removeClass("error");
			return true;
		}
	}
		function validatePostcode(){
		//if it's NOT valid
		if(postcode.val().length < 1){
			postcode.addClass("error");
			postcodeInfo.text("Please enter your postcode.");
			postcodeInfo.addClass("error");
			return false;
		}
		//if it's valid
		else{
			postcode.removeClass("error");
			postcodeInfo.text("");
			postcodeInfo.removeClass("error");
			return true;
		}
	}
});