function BtnSwap(btn) {
	var btnOn = document.getElementById(btn);
	btnOn.src = "images/"+btn+"_on.png";
}
function BtnRestore(btn) {
	var btnOff = document.getElementById(btn);
	btnOff.src = "images/"+btn+"_off.png";
}
function mapLoad() {
	if (GBrowserIsCompatible()) {
		var map = new GMap2(document.getElementById("map"));
		var point = new GLatLng(41.885898, -87.632427);
		map.setCenter(point, 15);
		map.addOverlay(createMarker(point));
		map.addControl(new GSmallMapControl());
		map.addControl(new GMapTypeControl());
	}
}
function createMarker(point, number) {
	var marker = new GMarker(point);
	GEvent.addListener(marker, "click", function() {
		marker.openInfoWindowHtml("<b>Nitrogen Design, Inc.</b><br/>203 N. La Salle St.<br/>Suite 2100<br/>Chicago IL 60601");
	});
	return marker;
}