/* rollover common code */
.rollover { display: block; } /* Allow setting widths and heights */
.rollover img { width: 100%; height: 100%; border: 0; } /* only set width and height once */
.rollover:hover { visibility: visible; /* for IE */ } /* sets any property for the :hover state */
.rollover:hover img { visibility: hidden; } /* 'rolls over' the image */

/* main nav rollovers */
#nav1 {
	background-image: url(../images/bt_ifima_in.jpg);    /* rollover state */
	width: 110px;                    /* image width */
	height: 33px;                   /* image height */
}
#nav2 {
	background-image: url(../images/bt_formacion_in.jpg);    /* rollover state */
	width: 170px;                    /* image width */
	height: 33px;                   /* image height */
}
#nav3 {
	background-image: url(../images/bt_contacto_in.jpg);    /* rollover state */
	width: 118px;                    /* image width */
	height: 33px;                   /* image height */
}

#nav {
	width: 683px;
	height: 33px;
	font-size:0px;
	line-height:0px;
}
#nav li {
	float:left;
	list-style-type: none;
	height: 33px;
}