function signup() {
	var firstname = $("#newsletter_firstname").val();
	var surname = $("#newsletter_surname").val();
	var email = $("#newsletter_email").val();
	
		
	if (firstname=='') 		{ alert('Please enter firstname'); return false; }
	if (surname=='') 		{ alert('Please enter surname'); return false; }
	if (!validateEmail(email)) 		{ alert('Please enter valid email address'); return false; }
	
	
	input_box = confirm("Is all information correct?");	
	if (input_box == true)	{
		$.ajax({
		   type: "POST",
		   url: "/signup.php",
		   data: "firstname="+firstname+"&surname="+surname+"&email="+email,
				 
		   // on success
		   error: function(){
				alert('ooops! - nasty error. Please try again.')
		   },
		   success: function(data){
			    if (data == 'OK') {
					$("#newsletter_firstname").val('');
					$("#newsletter_surname").val('');
					$("#newsletter_email").val('');
					
					alert('Thank you!');
					
				} else {
			   		alert('Try again');
		   		}
		   } 
		});
		return true;
	}
	else {	
		return false; 	
	}
}