var map;
var marker;

var myLat = 43.068887774169624;
var myLng = -15.46875;
var myType = G_PHYSICAL_MAP;
var myZoom = 1;

function initMap() 
{
    if(GBrowserIsCompatible()) 
    {
		map = new GMap2(document.getElementById("map_canvas"),{size: new GSize(500,375)});
		map.setCenter(new GLatLng(myLat, myLng), myZoom);
		map.setUIToDefault();		
        map.enableContinuousZoom();
        map.enableScrollWheelZoom();
        map.setMapType(myType);
		
        // Marker
        if(isObject(marker))
        {
		    map.addOverlay(marker);
	    }
    }
}