var centerLatitude =23.234603;
var centerLongitude = 77.402222;
var startZoom = 17;
var description = 'Madhya Bharat Telecom Infrastructures,<br>119 Malvia Nagar Bhopal';

var map;

function addMarker(latitude, longitude, description) {
var marker = new GMarker(new GLatLng(latitude, longitude));
GEvent.addListener(marker, 'click',
function() {
marker.openInfoWindowHtml(description);
}


);


map.addOverlay(marker);
}

function init() {
if (GBrowserIsCompatible()) {
map = new GMap2(document.getElementById("map"));
map.addControl(new GSmallMapControl());
map.setCenter(new GLatLng(centerLatitude, centerLongitude), startZoom);
addMarker(centerLatitude, centerLongitude, description);



}
}
window.onload = init;
window.onunload = GUnload;