function mostrar(modulo1,modulo2,modulo3,modulo4){
    ShowLayer(modulo1);
    HideLayer(modulo2);
    HideLayer(modulo3);
    HideLayer(modulo4);
}

function ShowHideLayer(sLayerName)
{
	oLayer = document.getElementById(sLayerName);
	
	if (!oLayer) {
		return;
	}

	if (oLayer.style.visibility == "hidden") {
		ShowLayer(sLayerName);
	} else {
		HideLayer(sLayerName);
	}
	
	return;
}

function HideLayer(sLayerName)
{
	oLayer = document.getElementById(sLayerName);
	
	if (!oLayer) {
		return;
	}
	oLayer.style.visibility = "hidden";
	oLayer.style.display = "none";

}

function ShowLayer(sLayerName)
{
	oLayer = document.getElementById(sLayerName);
	
	if (!oLayer) {
		return;
	}
	oLayer.style.visibility = "visible";
	oLayer.style.display = "block";

}