.cajaarriba{
width: 795px;margin:0 auto 0 auto;
background-image: url("arriba.gif");
background-position: top center;
background-repeat: no-repeat;
background-color:#185776;
color: #ffffff;
}
.cajaabajo {
background-image: url("abajo.gif");
background-position: bottom left;
background-repeat: no-repeat;
padding: 5px 5px 5px 5px;
}