#corpo_interno {
	float: left;
	width: 100%;
	background-color: transparent;
	background-image: url("../../img/sfondo_corpo_interno.png");
	background-position: 80% 0;
	background-repeat: repeat-y;
}

#colonna_1  {
	width: 20%;
	float: left;
}

#colonna_2 {
	width: 60%;
	float: left;
	min-height: 300px;
}

#colonna_3 {
	margin-left: 80%;
}