In my admin area, I would like to give the user the option to
'Preview' the page they are creating or editing.  I just can't quite
get my head around how to do it, so wondered if anyone can advise me.

Ideally, here's what I'd like: the user is editing a page in the admin
area, and at any time can click a button which says 'Preview'.  This
opens a new window which shows what the page would look like if the
current information was saved.  The user can close the window, edit
the page some more, and preview it as much as they want.

The issue is this:
> If I use a 'Preview' button, I can send the current data to the controller 
> and show a page with that data.  However, this doesn't let me open the page 
> in a new window.  I don't really want the user to have to use the back 
> button, as that interrupts the flow of the process.
> If I use a Preview link, I can open a new window, but cannot send the data to 
> the page for display.

Has anyone done this before, and can you suggest how I might go about
it?  Would I need to use javascript or ajax?  I haven't used Ajax
before, although I'm happy enough with javascript.

Thanks!

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