iView Communication (without eventing?)

I try to reload an iView from another iView (same page). I managed to create the necessary URL for the iView to be reloaded using the URLGenerator, but I can't determine this iViews IFRAME-name.

<a href="<URL>" target="<TARGET>">...</a>

Or in other words, I know what has to go into <URL> but don't know the <TARGET>, as it is dynamically created by the Portal.

Also it seems that I can't use client eventing, because I can't modify the target iView, which would have to act as a event receiver.

Any ideas?