var c_roadmap       = google.maps.MapTypeId.ROADMAP;
var c_hybrid        = google.maps.MapTypeId.HYBRID;
var c_satellite     = google.maps.MapTypeId.SATELLITE;
var c_terrain       = google.maps.MapTypeId.TERRAIN;

var c_top_left      = google.maps.ControlPosition.TOP_LEFT;
var c_bottom_right  = google.maps.ControlPosition.BOTTOM_RIGHT;
var c_top_right     = google.maps.ControlPosition.TOP_RIGHT;

var c_zoom_pan      = google.maps.NavigationControlStyle.ZOOM_PAN;

var c_zoom_control_small = google.maps.ZoomControlStyle.SMALL;
var c_zoom_control_large = google.maps.ZoomControlStyle.LARGE;