function google_map(canvas, lat, lng, zoom){

	var marker_map_center = true;

	if(lat==0||lng==0)
		return false;

	var latlng = new google.maps.LatLng(lat, lng);

	var myOptions = {
		zoom: zoom,
		center: latlng,
		mapTypeId: google.maps.MapTypeId.ROADMAP,
		streetViewControl: true
	};
	var map = new google.maps.Map(document.getElementById(canvas), myOptions);

	if(arguments.length>3){
		marker_map_center = arguments[4];
	}

	if(marker_map_center){
		var marker = new google.maps.Marker({
			position: latlng,
			map: map
		});
	}

	return map;

}