function hideNav1() {
	document.getElementById("mainNav-links-1").style.display = "none";
	document.getElementById("mainNav-links-2").style.display = "none";
	document.getElementById("mainNav-links-3").style.display = "none";
	document.getElementById("mainNav-heading1-hide").style.display = "none";
	document.getElementById("mainNav-heading1-show").style.display = "block";
	return false;
}

function showNav1() {
	document.getElementById("mainNav-links-1").style.display = "block";
	document.getElementById("mainNav-links-2").style.display = "none";
	document.getElementById("mainNav-links-3").style.display = "none";
	document.getElementById("mainNav-heading1-show").style.display = "none";
	document.getElementById("mainNav-heading1-hide").style.display = "block";
	return false;
}

function hideNav2() {
	document.getElementById("mainNav-links-1").style.display = "none";
	document.getElementById("mainNav-links-2").style.display = "none";
	document.getElementById("mainNav-links-3").style.display = "none";
	document.getElementById("mainNav-heading2-hide").style.display = "none";
	document.getElementById("mainNav-heading2-show").style.display = "block";
	return false;
}

function showNav2() {
	document.getElementById("mainNav-links-1").style.display = "none";
	document.getElementById("mainNav-links-2").style.display = "block";
	document.getElementById("mainNav-links-3").style.display = "none";
	document.getElementById("mainNav-heading2-show").style.display = "none";
	document.getElementById("mainNav-heading2-hide").style.display = "block";
	return false;
}

function hideNav3() {
	document.getElementById("mainNav-links-1").style.display = "none";
	document.getElementById("mainNav-links-2").style.display = "none";
	document.getElementById("mainNav-links-3").style.display = "none";
	document.getElementById("mainNav-heading3-hide").style.display = "none";
	document.getElementById("mainNav-heading3-show").style.display = "block";
	return false;
}

function showNav3() {
	document.getElementById("mainNav-links-1").style.display = "none";
	document.getElementById("mainNav-links-2").style.display = "none";
	document.getElementById("mainNav-links-3").style.display = "block";
	document.getElementById("mainNav-heading3-show").style.display = "none";
	document.getElementById("mainNav-heading3-hide").style.display = "block";
	return false;
}

function hideNav4() {
	document.getElementById("mainNav-links-1").style.display = "none";
	document.getElementById("mainNav-links-2").style.display = "none";
	document.getElementById("mainNav-links-3").style.display = "none";
	document.getElementById("mainNav-heading4-hide").style.display = "none";
	document.getElementById("mainNav-heading4-show").style.display = "block";
	return false;
}

function showNav4() {
	document.getElementById("mainNav-links-1").style.display = "none";
	document.getElementById("mainNav-links-2").style.display = "none";
	document.getElementById("mainNav-links-3").style.display = "none";
	document.getElementById("mainNav-heading4-show").style.display = "none";
	document.getElementById("mainNav-heading4-hide").style.display = "block";
	return false;
}