body {
	text-align:center;
	margin:0 auto;		
}

#contenedor {
	margin:0 auto;
	left:0px;
	top:auto;
	width: 778px;
	height:921px;
	position: relative;
}

.lateralIzq {
	background-image:url(../images/lateralIzq.gif);
	background-repeat:repeat-y;
}

.lateralDer {
	background-image:url(../images/lateralDer.gif);
	background-repeat:repeat-y;
}

.texto {
	margin-top: 0px;
	font-family: "Trebuchet MS", Arial, Helvetica, sans-serif;
	font-size: 9pt;
	font-style: normal;
	text-align: justify;
	line-height: 19px;
	font-weight: normal;
	letter-spacing: normal;
	word-spacing: normal;
}

.btnDocente {
	display:block;
	width: 120px;
	height: 35px;
	position: absolute;
	left: 192px;
	top: 319px;
	background: url(../images/btnDocente.png) 0px 0px no-repeat;
}

.btnEstudiante {
	display:block;
	width: 120px;
	height: 35px;
	position: absolute;
	left: 328px;
	top: 319px;
	background: url(../images/btnEstudiante.png) 0px 0px no-repeat;
}

.btnInvitado {
	display:block;
	width: 120px;
	height: 35px;
	position: absolute;
	left: 463px;
	top: 319px;
	background: url(../images/btnInvitado.png) 0px 0px no-repeat;
}

:hover { 
	background-position: 0px -35px;
}

:active {
	background-position: 0px -70px;
}