How do you delete a post?

You can only delete / edit a post under your user name, and only if there are no replies to it.
You must be logged in.
Use the little box icon with an "X" in it. It should be a small button on the bottom right of the post.
Another way is to edit a post to take out the text and then change the subject line to "Delete" and at that point a moderator will come along and clear out the post.
DD