openlayers地图全屏显示的代码

最近项目需要，着手GeoServer+Udig+Openlayers搭建本地地图服务器，第一次接触这些东西，参考了网上很多相关文章，如今初有感觉，但仍属入门。近日项目需要，故在Openlayers官网上认真学习了很Demo,初见成效。Demo真是个好东西，比较直观，以下对全屏控制代码：

 

 1 var map = new OpenLayers.Map({
 2     div: "map",
 3     layers: [
 4         new OpenLayers.Layer.OSM("OSM (without buffer)"),
 5         new OpenLayers.Layer.OSM("OSM (with buffer)", null, {buffer: 2})
 6     ],
 7     controls: [
 8         new OpenLayers.Control.Navigation({
 9             dragPanOptions: {
10                 enableKinetic: true
11             }
12         }),
13         new OpenLayers.Control.PanZoom(),
14         new OpenLayers.Control.Attribution()
15     ],
16     center: [0, 0],
17     zoom: 3
18 });
19 
20 map.addControl(new OpenLayers.Control.LayerSwitcher());