Hide 'New Item' and other functionality buttons from displaying

From: Minas Papageorgiou (MinasPapageorgiou_at_discussions.microsoft.com)
Date: 09/06/04 

Date: Mon, 6 Sep 2004 03:49:03 -0700

How can I set the permissions to a list so that the button "New Item" doesn't
display to users that belong in the Readers group?

These users can click on the button, enter the content and only when saving
it does it ask for a username and password that has permission to publish.

Thanx.