facebook registration plugin form's target problem

I am using facebook registration plugin . (http://developers.facebook.com/docs/plugins/registration/)

I need to use it in a 开发者_JAVA技巧modal box or in an iframe.

but there is a problem about its form target. form sends data to "_top" frame.

How can I change it to "_self" or "mytargetname"

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This is a known issue with facebook registration plugin.

Refer this link : http://bugs.developers.facebook.net/show_bug.cgi?id=15062