div.valign {
height: 480px; /*esto será según vuestras necesidades*/
width: 99%; /*esto no debería ser necesario*/
position: absolute;
top: 50%;
margin-top: -240px; /*muy importante, aquí usaremos la mitad del height pero en negativo*/
}
img {
 border:0px;
 vertical-align:middle;
}
.zonablanco {
	font: lighter 16px "Helvetica Neue", Helvetica, Arial, sans-serif;
	color: #FFFFFF;
	text-decoration: none;
}

.cajas_noborder {
	font: 11px Helvetica, Arial, sans-serif;
	color: #666666;
	text-decoration: none;
	height: 14px;
	border-top-width: 0px;
	border-right-width: 0px;
	border-bottom-width: 1px;
	border-left-width: 0px;
	border-top-style: none;
	border-right-style: none;
	border-bottom-style: solid;
	border-left-style: none;
	border-top-color: #FFFFFF;
	border-right-color: #FFFFFF;
	border-bottom-color: #DBDBDB;
	border-left-color: #FFFFFF;
	width: auto;
}

.cajas_noborderm {
	font: 11px Helvetica, Arial, sans-serif;
	color: #666666;
	text-decoration: none;
	border: 1px solid #DBDBDB;
	height: 54px;
	width: 312px;
}

.tituloprov {
	font: 11px Helvetica, Arial, sans-serif;
	color: #333333;
	text-decoration: none;
}
.tituloprov12 {
	font: 12px Helvetica, Arial, sans-serif;
	color: #666666;
	text-decoration: none;
}
.enl {
	font: 12px Helvetica, Arial, sans-serif;
	color: #999900;
	text-decoration: none;
}
.enl11 {

	font: 11px Helvetica, Arial, sans-serif;
	color: #999900;
	text-decoration: none;
}
.bl11 {


	font: 11px Helvetica, Arial, sans-serif;
	color: #FFFFFF;
	text-decoration: none;
}
.zonagris {

	font: lighter 14px "Helvetica Neue", Helvetica, Arial, sans-serif;
	color: #666666;
}
.cajas_borderv {
	font: 14px "Helvetica Neue", Helvetica, Arial, sans-serif;
	color: #666666;
	text-decoration: none;
	width: auto;
	border: 1px solid #999900;
}
.subrayado {
	border-bottom-width: 1px;
	border-bottom-style: solid;
	border-bottom-color: #666666;
	font: normal 14px "Helvetica Neue", Helvetica, Arial, sans-serif;
	color: #999900;
	text-decoration: none;
}
a.paginacion {
	font: normal 12px "Helvetica Neue", Helvetica, Arial, sans-serif;
	color: #888888;
	text-decoration: none;
}
a.paginacion_bold {
	font: normal 12px "Helvetica Neue", Helvetica, Arial, sans-serif;
	color: #B5B91A;
	text-decoration: none;
	/*font-weight:bold;*/
	border-bottom: #333333 1px solid;
}
a.enl_tit {
 	font:  Helvetica, Arial, sans-serif;
	color: #666666;
	text-decoration: none;
}
a.enl_tit:hover {
 color: #B5B91A; 
}
a.enl_port {
 	font: 12px Helvetica, Arial, sans-serif;
	color: #666666;
	text-decoration: none;
}
a.enl_port:hover {
 color: #B5B91A; 
}