.quadratosinistro {
 float:left;
 padding-right:10px;
 padding-bottom:5px;
}

.panregistrati {
float:left;
border:1px dotted #d2d2d2;
height:80px;
width:330px;
padding:10px;
font-size:9px;
margin-left:80px;
}

.panlogin {
float:left;
margin-left:60px;
border:1px dotted #d2d2d2;
height:80px;
width:330px;
padding:10px;
font-size:9px;
}

.floatdestra {
 float:right;
 width:240px;
 height:80px;
 border-left:1px dotted #d2d2d2;
 padding-left:10px;
}