.fondo {
visibility:hidden;
position: fixed;
top:0px;
left:0px;
width: 100%;
height: 100%;
z-index: 9;
 float: left;
}
.cuerpo {
visibility:visible;
position: absolute;
top:0px;
left:0px;
width: 100%;
height: 100%;
z-index: 2;
text-align: center;
}
.intrusivo {
visibility:hidden;
position: fixed;
z-index: 15;
top:0px;
left:0px;
width: 100%;
height: 100%;
text-align: center;
 float: left;
 bottom: auto;
 vertical-align: baseline;
}
.flash {
visibility:hidden;
z-index: 14;
width: 810px;
margin: 0 auto;
}