google map api3 中添加标记

效果如图

让用户自己添加标记```随意添加地图中的任意位置

这部分是谷歌地图的```

var map, geocoder,ismarker=0,marker;
		function initialize() {
			var latlng = new google.maps.LatLng(39.904214, 116.407413);
			var options = {
				zoom: 11,
				center: latlng,
				disableDefaultUI: true,
				panControl: true,
				zoomControl: true,
				mapTypeControl: true,
				scaleControl: true,
				streetViewControl: false,
				overviewMapControl: true,
				mapTypeId: google.maps.MapTypeId.ROADMAP
			};
			map = new google.maps.Map(document.getElementById("map_canvas"), options);
			geocoder = new google.maps.Geocoder();
			google.maps.event.addListener(map, 'click', function(event) {
					if(ismarker==1){
						ismarker=2;
						placeMarker(event.latLng);
					}
				});
		}
		function placeMarker(location) {
				marker = new google.maps.Marker({
					position: location, 
					map: map,
					draggable:true
				});
				var infowindow = new google.maps.InfoWindow({
				content: "标记是可以拖动的"
			});
			google.maps.event.addListener(marker, 'click', function() {
          			infowindow.open(marker.get('map'), marker);
        		});			
			}
		function search(address) {
			if (!map) return;
			geocoder.geocode({address : address}, function(results, status) {
				if (status == google.maps.GeocoderStatus.OK) {
					map.setZoom(11);
					map.setCenter(results[0].geometry.location);
				} else {
					alert("Invalid address: " + address);
				}
			});
		}

这部分是调用了jquery和artdialog

$("#addmarker").click(function(){
				if(ismarker==2){
				art.dialog({
				title:'添加失败',
				content:'标记已经存在或者即将存在,请删除后标记后重新添加',
				lock:true,
				ok:true,
				cancel:true
				})
				}else{
			art.dialog({
				title:'添加标记',
				content:'现在单击地图任意一点即添加标记,<font color=red>标记是可拖动</font>,请把标记移到合适的位置',
				lock:true,
				ok:function(){
					ismarker=1;
				},
				cancel:true
				})
			ismarker=0;
			}
		})
		$("#deletemarker").click(function(){
			
			art.dialog({
				title:'删除标记',
				content:'你已经删除了标记',
				lock:true,
				ok:function(){
					marker.setMap(null);
					ismarker=0;
				},
				cancel:true
				})
				
		})

这部分是html

<div class="width margintop20">
		<div class="width200  left">
			<div class="right line-height30 size14">交换所在地(地图):</div>
		</div>
		<div class="left"><input id="map_address" style="width:200px;height:30px;border:1px solid #ababab;"><input type="button" id="map-search-sumbit" class="login_btn" value="搜索"/></div>	
	</div>
	<div class="clear"></div>
	<div class="width margintop10">
		<div class="width200  left">
			<div class="right line-height30 size14"></div>
		</div>
		<div class="left"><input type="button" class="login_btn" value="添加标记" id="addmarker"/><input type="button" class="login_btn" value="删除标记" id="deletemarker"/></div>	
	</div>
	<div class="clear"></div>