$(document).ready(function(){
$("form").submit(function(){

var str = $("form").serialize();

   $.ajax({
   type: "POST",
   url: "binct/contact.php",
   data: str,
   success: function(msg){
    
$("#note").ajaxComplete(function(event, request, settings){

if(msg == 'OK') 
{
result = '<div class="notification_ok">Su mensaje ha sido enviado.</div>';
$("#form").show();
}
else
{
result = msg;
}

$(this).html(result);

});

}

 });

return false;

});

});