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

//MapZoomStep

var pStep = new MapZoomStep(mapbase);

//create Zoom previous tool

var ZoomLastTool = new ZoomLastTool(pStep, true);

ZoomLastTool.InitialMapBase(mapbase);

//recover to previous zoomview

ZoomLastTool.MapCommand();

//create Zoom next tool

ZoomNextTool = new ZoomLastTool(pStep, false);

ZoomNextTool.InitialMapBase(mapbase);

//recover to next zoomview

ZoomNextTool.MapCommand();