jsf 2.0 viewscope in two windows need to refresh each other

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I have a problem:

I have a View-Scoped bean/view with an overview of some data (list). when someone clicks on an item, it opens another view-scoped window/browser tab which loads and shows some detailed information about the item clicked.

All I need is the "overview-window" to change the status-image from "unread" to "read" (i would prefer ajax), when the user opens a detail page, so i need a kind of a property-injection; but does this work in two different view-scopes?

How can I do this?

thanks very much for your help

add. info: I tried property-injection (other view-scoped bean); but the values are resetted; seems like it created a new view-scoped overview bean with no content)

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