var nc = (document.layers) ? true:false;
var ie =  (document.all) ? true:false;
var n6 = (document.getElementById) ? true:false;

function muestra(id) {
	if (ie) {
		ocultaTodos();
		document.all[id].style.visibility="visible";
		document.all[id].style.display="block";
	} else if(nc) {
		document.layers[id].visibility="show";
		document.layers[id].display="block";
	} else if(n6) {
		document.getElementById(id).style.visibility="visible";
		document.getElementById(id).style.display="block";
	}
}


function oculta(id) {
	if(ie) {
		document.all[id].style.visibility="hidden";
		document.all[id].style.display="none";
	} else if(nc) {
		document.layers[id].visibility="hidden";
		document.layers[id].display="none";
	} else if(n6) {
		document.getElementById(id).style.visibility="hidden";
		document.getElementById(id).style.display="none";
	}
}

function ocultaTodos() {
	if(ie) {
		document.all['home'].style.visibility="hidden";
		document.all['oferta'].style.visibility="hidden";
		document.all['caracteristicas'].style.visibility="hidden";
		document.all['requisitos'].style.visibility="hidden";
		document.all['registrarse'].style.visibility="hidden";
		document.all['contacto'].style.visibility="hidden";
		document.all['quienes'].style.visibility="hidden";
		document.all['politicas'].style.visibility="hidden";
		document.all['politicas01'].style.visibility="hidden";
		document.all['politicas02'].style.visibility="hidden";
		document.all['politicas03'].style.visibility="hidden";
		document.all['politicas04'].style.visibility="hidden";
		document.all['politicas05'].style.visibility="hidden";
		document.all['gracias'].style.visibility="hidden";
	} else if(nc) {
		document.layers['home'].visibility="hidden";
		document.layers['oferta'].visibility="hidden";
		document.layers['caracteristicas'].visibility="hidden";
		document.layers['requisitos'].visibility="hidden";
		document.layers['registrarse'].visibility="hidden";
		document.layers['contacto'].visibility="hidden";
		document.layers['quienes'].visibility="hidden";
		document.layers['politicas'].visibility="hidden";
		document.layers['politicas01'].visibility="hidden";
		document.layers['politicas02'].visibility="hidden";
		document.layers['politicas03'].visibility="hidden";
		document.layers['politicas04'].visibility="hidden";
		document.layers['politicas05'].visibility="hidden";
		document.layers['gracias'].visibility="hidden";
	} else if(n6) {
		document.getElementById('home').style.visibility="hidden";
		document.getElementById('oferta').style.visibility="hidden";
		document.getElementById('caracteristicas').style.visibility="hidden";
		document.getElementById('requisitos').style.visibility="hidden";
		document.getElementById('registrarse').style.visibility="hidden";
		document.getElementById('contacto').style.visibility="hidden";
		document.getElementById('quienes').style.visibility="hidden";
		document.getElementById('politicas').style.visibility="hidden";
		document.getElementById('politicas01').style.visibility="hidden";
		document.getElementById('politicas02').style.visibility="hidden";
		document.getElementById('politicas03').style.visibility="hidden";
		document.getElementById('politicas04').style.visibility="hidden";
		document.getElementById('politicas05').style.visibility="hidden";
		document.getElementById('gracias').style.visibility="hidden";
	}
}