Leaflet demo

For update marker position

HTML

<script src="http://cdn.leafletjs.com/leaflet-0.7.2/leaflet.js"></script>
<link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet-0.7.2/leaflet.css">
<div id="map"></div>

CSS

#map {
    height: 500px;
    width: 80%;
}

JavaScript

var osmUrl = 'http://{s}.tile.osm.org/{z}/{x}/{y}.png',
	 	    osmAttrib = '&copy; <a href="http://openstreetmap.org/copyright">OpenStreetMap</a> contributors',
	 	    osm = L.tileLayer(osmUrl, {
	 	        maxZoom: 18,
	 	        attribution: osmAttrib
	 	    });

	 	// initialize the map on the "map" div with a given center and zoom
	 	var map = L.map('map').setView([39.61, -105.02], 12).addLayer(osm);

var littleton = L.marker([39.61, -105.02]).bindPopup('This is Littleton, CO.'),
    denver    = L.marker([39.74, -104.99]).bindPopup('This is Denver, CO.'),
    aurora    = L.marker([39.73, -104.8]).bindPopup('This is Aurora, CO.'),
    golden    = L.marker([39.77, -105.23]).bindPopup('This is Golden, CO.');

var cities = L.layerGroup([littleton, denver]);
var street = L.layerGroup([aurora, golden]);
var overlayMaps = {
    "Cities": cities,
    "Street": street
};
var baseMaps = {
    
};
L.control.layers(baseMaps,overlayMaps).addTo(map);