function hideOverlay() {
	d = "overlay"
	if (document.getElementById(d).style.display == "none" || document.getElementById(d).style.display == null) {
		document.getElementById(d).style.display = "block";
		document.getElementById("maincontent").style.display = "block";
		document.getElementById("title").style.display = "block";
	}
	else {
		document.getElementById(d).style.display = "none";
		document.getElementById("maincontent").style.display = "none";
		document.getElementById("title").style.display = "none";
	}
}

function showOverlay() {
	d = "overlay"
	if (document.getElementById(d).style.display == "none") {
		document.getElementById(d).style.display = "block";
	}

}