JavaScript Back Buttons

Hi all
I do hope someone can help me with a little JavaScript problem?
My web page ([B]Page 1[/B]) has a menu which takes the user to a new page using the target=_blank.
It is therefore opening in a new page ([B]Page 2[/B]) on a new instance of IE7. This is exactly what I wanted. But I also need the user to click on a “Back” button of some kind, which hopefully will take the user back to the first page ([B]Page 1[/B]) and hopefully close [B]Page 2[/B].
I have been experimenting with href=”javascript:history.back()” and so on, but the best I can get is it opens a new instance of [B]Page 1[/B] in place of [B]Page 2[/B]. This then leaves two instances of [B]Page 1[/B].
Obviously this is far from ideal so any thoughts or solutions even will be greatly appreciated.

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