2.1 library：http://help.arcgis.com/EN/webapi/javascript/arcgis/help/jshelp/arcgis_js_v21_api.zip
2.1 sdk：http://help.arcgis.com/EN/webapi/javascript/arcgis/help/jshelp/arcgis_js_v21_sdk.zip
2.0 library：http://help.arcgis.com/EN/webapi/javascript/arcgis/help/jshelp/arcgis_js_v20_api.zip
2.0 sdk：http://help.arcgis.com/EN/webapi/javascript/arcgis/help/jshelp/arcgis_js_v20_sdk.zip
2.1 sdk：http://help.arcgis.com/EN/webapi/javascript/arcgis/help/jshelp/arcgis_js_v21_sdk.zip
2.0 library：http://help.arcgis.com/EN/webapi/javascript/arcgis/help/jshelp/arcgis_js_v20_api.zip
2.0 sdk：http://help.arcgis.com/EN/webapi/javascript/arcgis/help/jshelp/arcgis_js_v20_sdk.zip
1.6版现在不提供下载，如果你的server是93或者931也可以用2.0和2.1的，但是像编辑，图例等功能就不能用了，因为那些都是依托server10的