.testo1 {
	font-family: Arial, Helvetica, sans-serif;
}
#l1 {
	position:absolute;
	width:800px;
	height:756px;
	z-index:1;
	left: 200px;
	top: 10px;
	overflow: visible;
}
a.linkopaco:hover img {
filter:alpha(opacity=50);
-moz-opacity: 0.5;
opacity: 0.5;
}
 
a.linkopaco img {
filter:alpha(opacity=100);
-moz-opacity: 1.0;
opacity: 1.0;
}