$(document).ready(function(){
    	$("div.newsletterBoxThankYou").hide();
    	
    	clicked = false;
    	
		$("img.signupButton").click(function(event){
			if(clicked)
				return;
			
			if(validateEmail($('#email').val())){
				clicked = true;
				
				$.ajax({
					type: "POST",
					url: "./addNewsLetter.php",
					data: "email="+$('#email').val()+"&name="+$('#newsletterName').val()+"&occupation="+$('#newsletterOccupation').val()+"&country="+$('#newsletterCountry').val(),
					success: function(msg){
						$("div.newsletterBox").hide();
						$("div.newsletterBoxThankYou").show();	
						$("div.signupButton").hide();	
					}
				});
			}
		});	
	});
	
	
	function validateEmail(email){
		var emailRegEx = /^([a-zA-Z0-9_\.\-])+\@(([a-zA-Z0-9\-])+\.)+([a-zA-Z0-9]{2,4})+$/;
		
		if(email.match(emailRegEx)){
			return true;
		}else{
			alert('Please enter a valid email address.');
			return false;
		}
	}