.avisos {display:block; padding:3px; margin-top:15px;  margin-bottom:15px; font-weight:bold; text-align:center;}
.error {color:#FFFFFF; background-color:#FF0000; }
.ok    {color:#FFFFFF; background-color:#00AA00; }
.info  {color:#000; font-weight:normal; background-color:#FFFFCC; border:1px solid #FFCC00;}