有遮罩层 有标记提示，可以动态查询 地址的 经纬度。下面是代码

<meta name="viewport" content="initial-scale=1.0, user-scalable=yes" />
<script type="text/javascript" src="http://maps.google.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">var geocoder;  var map;    function createMap(address){		if(address == null || address=="") return false;		geocoder = new google.maps.Geocoder();		if(geocoder){			geocoder.geocode({address:address},function(results,status){				if(status == google.maps.GeocoderStatus.OK){				     var location = results[0].geometry.location;					 var options = {					     zoom:16,						 center:location,						 mapTypeId:google.maps.MapTypeId.ROADMAP					 };					 map =new google.maps.Map(document.getElementById("map_canvas"),options);					 var marker = new google.maps.Marker({						map: map, 						position: location,						title:address					});					var infowindow = new google.maps.InfoWindow({ 						content: "
<div>
"+address+"
</div>
",						size: new google.maps.Size(50,20),						position:location,						pixelOffset:new google.maps.Size(5,5)					});					infowindow.open(map);				}else {					alert("Geocode was not successful for the following reason: " + status);				}						});				}		  }    function initialize() {    createMap("your address  e.g: 北京");  }  function codeAddress() {    var address = document.getElementById("address").value;    if (geocoder) {      geocoder.geocode( { 'address': address}, function(results, status) {        if (status == google.maps.GeocoderStatus.OK) {          map.setCenter(results[0].geometry.location);		  map.setZoom(16);          var marker = new google.maps.Marker({              map: map,               position: results[0].geometry.location,			  title:address          });		  var infowindow = new google.maps.InfoWindow({ 		        content: "<span>"+address+"</span>",                size: new google.maps.Size(40,10),                position: results[0].geometry.location,				pixelOffset:new google.maps.Size(5,5)          });		infowindow.open(map);		}     });  } else {          alert("Geocode was not successful for the following reason: " + status);        }  }</script>
<div id="map_canvas" style="width:800px;height:600px;margin:0 auto;">
</div>
<div>
<input id="address" type="textbox" value="your address eg:北京" /> <input type="button" value="Encode" onclick="codeAddress()" />
</div>