html, body{  
	display:block;
	background-image:url(../images/sfondo-sx2.jpg);
	background-position:top;
	background-repeat:no-repeat;
	width:100%;
	min-height:100%;
	height: auto !important; 
	height: 100%;
	margin:0;
}  
#Blocco {
	width: 100%;
	height: 100%;