<script type="text/javascript" src="scripts/MapBase.js"></script>

<script type="text/javascript" src="scripts/Controls.js"></script>

//Get layer extent

var pLyr = new MapLayer("Layer name", "Agent.aspx");

var pExt = new MapEnvelope(pLyr.getLeft(), pLyr.getTop(), pLyr.getRight(), pLyr.getBottom());

//Scale map to fit client's monitor size

var sx = mapNode.clientWidth / (pExt.Right - pExt.Left);

var sy = mapNode.clientHeight / (pExt.Bottom - pExt.Top);

var s = (Math.abs(sx) < Math.abs(sy) ? Math.abs(sx) : Math.abs(sy));

var pTrans = new LevelTransformation(1, 0, 10);

pTrans.putBaseScaleX(sx > 0 ? s : -s);

pTrans.putBaseScaleY(sy > 0 ? s : -s);

//Create map

var pMapBase = new MapBase(pOMap, pTrans, 0, 0, "100%", "100%");

//Iinitialize scale bar tool

var pScale = new ScaleBarControl(pMapBase.getHPackage(), pMapBase);

//Add scale bar to map element

pMapBase.AddElement(pScale);