billboard response to an event

hi,

I have mapped a image to a billboard. and I want to click the billboard and see the big picture of the image. Can billboard response to this click event?? how to do this?

Why do you cross post, again?

http://www.ogre3d.org/phpBB2/viewtopic.php?p=298608&sid=ce193664e1d3d7c4af509e6f4e2718c6