*GMapPane [enum]
http://www.google.com/apis/maps/documentation/
**Version 2 (2006.4) &font(Red){新規};
>These constants define the layering system that is used by overlay to display themselves on the map. There are different layers for icons, shadows, the info window, the shadow on the info window, and transparent mouse event catching objects.
>You need to use this type if you subclass from GOverlay.
***Constants
|TLEFT||c
|Constants|Description|h
|G_MAP_MAP_PANE|This pane is still below the shadows of the markers, directly on top of the map. It contains for instance the polylines.|
|G_MAP_MARKER_SHADOW_PANE|This pane contains the shadows of the markers. It is below the markers.|
|G_MAP_MARKER_PANE|This pane contains the markers.|
|G_MAP_FLOAT_SHADOW_PANE|This pane conatains the shadow of the info window. It is above the G_MAP_MARKER_PANE, so that markers can be in the shadow of the info window.|
|G_MAP_MARKER_MOUSE_TARGET_PANE|This pane contains transparent elements that receive DOM mouse events for the markers. Is is above the G_MAP_FLOAT_SHADOW_PANE, so that markers in the shadow of the info window can be clickable.|
|G_MAP_FLOAT_PANE|This pane contains the info window. It is above everything else on the map.|