Widget:Leaflet

<link rel="stylesheet" href="http://cdn.leafletjs.com/leaflet-0.4.4/leaflet.css" />

<script src="http://cdn.leafletjs.com/leaflet-0.4/leaflet.js"></script>

<script>

var map = L.map('map').setView([51.505, -0.09], 13);

L.tileLayer('http://{s}.tile.cloudmade.com/BC9A493B41014CAABB98F0471D759707/997/256/{z}/{x}/{y}.png', { maxZoom: 18, attribution: 'Map data © <a href="http://openstreetmap.org">OpenStreetMap</a> contributors, <a href="http://creativecommons.org/licenses/by-sa/2.0/">CC-BY-SA</a>, Imagery © <a href="http://cloudmade.com">CloudMade</a>' }).addTo(map);

L.marker([51.5, -0.09]).addTo(map) .bindPopup("Hello world!
I am a popup.").openPopup();

L.circle([51.508, -0.11], 500, { color: 'red', fillColor: '#f03', fillOpacity: 0.5 }).addTo(map).bindPopup("I am a circle.");

L.polygon([ [51.509, -0.08], [51.503, -0.06], [51.51, -0.047] ]).addTo(map).bindPopup("I am a polygon.");

var popup = L.popup();

function onMapClick(e) { popup .setLatLng(e.latlng) .setContent("You clicked the map at " + e.latlng.toString()) .openOn(map); }

map.on('click', onMapClick);

</script>