function showMap(lon,lat,zoom,id)
{
	if(lon==null || lon=='undefine' || lon=='') lon=106.54677;
	if(lat==null || lat=='undefine' || lat=='') lat=29.56711;
	if(zoom==null || zoom=='undefine' || zoom=='') zoom=7;
	
	maplet = new Maplet(id);
	maplet.centerAndZoom(new MPoint(lon,lat), zoom);
	maplet.addControl(new MStandardControl());
	maplet.showOverview(false);
	maker = new MMarker(new MPoint(lon,lat),
							new MIcon("/Public/images/map/A.gif",23,21));
	maplet.addOverlay(maker);
}