Capturing keyboard shortcuts in an iframe: focusing?

I'm creating an IFrame to house an app that wants to listen to keypress events -- is there any way to give this iframe focus, so keypresses get passed to its own handlers, and not to the main p开发者_StackOverflow社区age's? (Clicking within the iframe works, but makes for an awful user-interface...)

Thanks!

-B

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calling focus on the iframe itself does the trick. E.g. in jquery:

$("#MyIFrame").focus()