jquery select something of the page in an iframe

Question

I got a page like this:

=========================================
|       PARENT!                         |
|                                       |
|                                       |
|            ===============            |
|            |    iframe   |            |
|            ===============            |
|                                       |
|                                       |
|                                       |
|                                       |
|                                       |
|                                       |
|========================================

is there any jQuery possible to select something in the parent window?

The pages are in different domains.

Answer 1

Yes, as long as the iframe is in the same domain as the parent the following works:

$('#idInParent', window.parent.document);

---

Updated: to make clear the fact that this requires same domain