// JavaScript Document

function showIntroduction() {
	document.getElementById("introduction").style.display="block";
	document.getElementById("history").style.display="none";
	document.getElementById("description").style.display="none";
	document.getElementById("photographs").style.display="none";
}

function showHistory() {
	document.getElementById("introduction").style.display="none";
	document.getElementById("history").style.display="block";
	document.getElementById("description").style.display="none";
	document.getElementById("photographs").style.display="none";
}

function showDescription() {
	document.getElementById("introduction").style.display="none";
	document.getElementById("history").style.display="none";
	document.getElementById("description").style.display="block";
	document.getElementById("photographs").style.display="none";
}

function showPhotographs() {
	document.getElementById("introduction").style.display="none";
	document.getElementById("history").style.display="none";
	document.getElementById("description").style.display="none";
	document.getElementById("photographs").style.display="block";
}