Integrating roundcube in iframe

[wurmi]

Hi all,
I am trying to intergrate rc in a larger suite based on ajax.
It gets loaded into an iframe.
I'd like to pass commands to rc from outside the iframe like "Start composing a mail to [email protected]".
I tried the following, but it didn't work:

  onclick="sendmail();return false;">[email protected]

can anyone help?

I'd also like to extend rc to fit my needs.
Therefore I plan to write a plugin for attachment management:
the user should be able to select files on the server and also I'd like to add a Flash Uploader like in Googlemail to make sending more and/or large files more convenient.
Is there some good tutorial except the one on the wiki?

Thanks for any replies!