1、dojo框架；

2、包的引用；

3、圖層新增；

<script>
//宣告兩個物件
var myMap;
var mapLayer;
var mapUrl;
dojo.require("esri.config");
dojo.require("dojo/domReady!");
dojo.require("esri.layers.graphics");
dojo.require("esri.layers.GraphicsLayer");
dojo.require("esri.geometry.jsonUtils");
dojo.require("esri.map");//依賴包的引用
 
dojo.addOnLoad(init);//新增頁面初始化事件
    //初始化事件
function init() {
        //初始化範圍
var initExtent = new esri.geometry.Extent({
            "xmin": 12676062,
"ymin": 2566164,
"xmax": 12710191,
"ymax": 2588674,
"spatialReference": {"wkid": 102100}
        });
//定義一個map實體
myMap = new esri.Map("mapDiv", {extent: initExtent});
 
mapUrl = "http://server.arcgisonline.com/ArcGIS/rest/services/World_Street_Map/MapServer";
//定義一個Layer切片圖層
mapLayer = new esri.layers.ArcGISTiledMapServiceLayer(mapUrl);
//裝載圖層
myMap.addLayer(mapLayer);
//監聽resize方法
dojo.connect(myMap, 'onLoad', function (theMap) {
            dojo.connect(dijit.byId('mapDiv'), 
 
'resize', myMap, myMap.resize);
});
}

</script>