How to execute code written in java before javascript?

Hello,
is there any way to call the action or actionlistener method of a commandbutton (for instance, or any other component), before javascript is executed? (jsf 1.2_09, glassfish v2.1)
Eg: I want to open a new window with javascript for the details/editing of a row in a data table. To do so I use a request scoped backing bean for the new window, and in its constructor I pass the rowdata through the session map where I put the object beforehand using an actionlistener/action.
But this won't work, because the script happens before I can put the variable in the session map...
Is there an other way?
thanks
david

only thing I can come up with is to submit the data using Ajax. So do an Ajax call (for example using JQuery) to submit an asynchronous request to some servlet that will put the data in the session bean, then when the Ajax call finishes open the window.

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