$.validator.setDefaults({		
		submitHandler: function() {			
			var email = $('#email_check').attr('value'); 
			$.ajax({  
				type: "POST",  
				url: "add_bulletin_user.php",  
				data: "email="+ email,  
				success: function(){  
					$('form#ajax_validation').hide(function(){$('div.success').fadeIn();});  
				}  
			});  
		return false; 		
		}		
	});
	
$().ready(function() {
	$("#ajax_validation").validate();	
});