howto acces attachmentinfo in attachment.php

[ageurtse]

How can i get the $attachmentinfo from the attachmentfile.

this is how i display a image
<img border=0 src=attachment.php?attachmentid=".$post['attachmentid']."&thumb=1 width=100% height=100%/>

but i would like to get the attachmentinfo information to display with the image, how can i do this.

i which to use this info in a plugin.