[CSS] Estilo Aviso

#mensagemAviso
{
    margin:22px 0 20px;
    padding:10px 5px;
    text-align:left;
        width:80%;
    height:14px;
    margin-left:16px;
                  display: none;
    color:#000000;
    border:1px solid #DCDCDC;
    background:#FFEBCD;
    -moz-border-radius:10px;
    -webkit-border-radius:10px;
}