要先获取Google地图的API 密钥：http://code.google.com/intl/zh-CN/apis/maps/signup.html
Google提供的开发文档很多
我的代码如下
Code
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head>
<title>Untitled Page</title>
<script src="http://maps.google.com/maps?file=api&v=2&sensor=false&key=ABQIAAAAfhiBJ2VvezGxWN5QTnJF1hRiMmuTicfa9ZYrooSj9awNojOYohQ2gsd6YmWEocGuZPza89ghBvNpWw" type="text/javascript"></script>
<script type="text/javascript">
function initialize() {
if (GBrowserIsCompatible()) {
var map = new GMap2(document.getElementById("map_canvas"));
map.setMapType(G_SATELLITE_MAP);
var point = new GLatLng(30.27697,120.127296);
map.setCenter(point, 17);
var marker = new GMarker(point);
GEvent.addListener(marker,"click", function() {
map.openInfoWindow(point,"<b>东方通信大厦！<br />我就在这上班</b>");
});
map.addOverlay(marker);
}
}
</script>
</head>
<body onload="initialize()" onunload="GUnload()">
<div id="map_canvas" style="width: 500px; height: 300px"></div>
</body>
</html>