[OpenLayers-Users] Get tiles from bounds

[francescoboccacci at libero.it]

Hi all,
i have a question about how to get all tiles url from getURL(bounds) from 
different zoom level.
I explain my purpose: I use an OSM layer and i like to know what is the tile 
from different zoom level that cover the center of the map.

mytiles = new OpenLayers.Layer.OSM ()

mytiles.getURL(bounds) i get http://localhost/tiles/10/1/1000.png for example. 
(zoom level 10)

How is possible to get the tiles URL for example of zoom 9 or zoom 11?

Thanks

Francesco