body {
background-color:#999999;
}
.testo {
	font-family: Verdana, Arial, Helvetica, sans-serif;
	font-size: 10px;
	font-style: normal;
	font-weight: normal;
	color: #333333;
	text-decoration: none;
}
.testobold {
	font-family: Verdana, Arial, Helvetica, sans-serif;
	font-size: 10px;
	font-weight: bold;
	color: #333333;
	text-decoration: none;
}
<!-- .iframe {
<!--background-image:url(immagini/prova.gif);
<!--background-position:bottom;
<!-- } -->