百度地图 JSAPI使用 mark 定位地址 与周边覆盖物

http://lbsyun.baidu.com/index.php?title=jspopular   api 

http://developer.baidu.com/map/jsdemo.htm#a1_2 实例地址 

var map = new BMap.Map("container");
        var preMarker = new BMap.Marker();
        map.addControl(new BMap.NavigationControl());//启用缩放轴
        map.addControl(new BMap.ScaleControl());//启用距离监测
        var myGeo = new BMap.Geocoder();        //创建地址解析实例
        myGeo.getPoint("${house.mapLocateaddress}", function (point) {
            if (point) {
                mPoint = new BMap.Point(point.lng, point.lat);
                map.centerAndZoom(mPoint, 16);
                displayPOI();
            } else {            	
            	myGeo.getPoint("${house.mapLocateaddress2}", function (point) {
                    if (point) {
                        mPoint = new BMap.Point(point.lng, point.lat);
                        map.centerAndZoom(mPoint, 16);
                        displayPOI();
                    }
                }, "广东省"); 
            	
            	
            }
        }, "广东省");   //必须设置城市
     /*   map.enableScrollWheelZoom();        //启用滚轮缩放*/
        var mOption = {
            poiRadius: 10000,           //半径为1000米内的POI,默认100米
            numPois: 30                //列举出50个POI,默认10个
        }
        //POI导航选中样式
        $("#map-indicator a").click(function () {
            $("#map-indicator a").removeClass("on");
            $(this).addClass("on");
            $("#env-list h3").text($("#map-indicator .on").html());
            displayPOI();
        })
        var allPois;
        var markers=[];
        function displayPOI() {
            map.clearOverlays();
            var poiType = $("#map-indicator .on").html();
            var circle = new BMap.Circle(mPoint,500,{fillColor:"blue", strokeWeight: 1 ,fillOpacity: 0.1, strokeOpacity: 0.1});
            map.addOverlay(circle);
            var local =  new BMap.LocalSearch(map, {renderOptions: {map: map, autoViewport: false,panel: "map-result-list"}});
            local.searchNearby(poiType,mPoint,500);
        }