GetMyTopoTile=function(a,b,c) {
     var lURL=this.myBaseURL;
     lURL+=b;
     lURL+="/"+a.x;
     lURL+="/"+a.y+".jpg";
     return lURL;
}

var mytopoCopy = new GCopyright(1,new GLatLngBounds(new GLatLng(-90, -180), new GLatLng(90, 180)),0,'&#169; MyTopo <a href="http://www.mytopo.com/google/index.cfm" target="_blank"><b>(Topo Maps Terms of Use)</b></a>')

var mytopoc = new GCopyrightCollection('');
mytopoc.addCopyright(mytopoCopy);
		
var tileMytopo = new GTileLayer(mytopoc,9,15);
tileMytopo.myLayers='topoG';
tileMytopo.myFormat='image/jpg';
tileMytopo.myBaseURL='http://maps.mytopo.com/mytopoz63g9R/tilecache.py/1.0.0/topoG/';

tileMytopo.getTileUrl=GetMyTopoTile;
		
var mytopoLayer=[tileMytopo];
			
var MYTOPO_MAP = new GMapType(mytopoLayer, G_SATELLITE_MAP.getProjection(), "MyTopo", G_PHYSICAL_MAP);