How to show report from button onClick event?

How to show report from button onClick event?

Sorry, can't find this in Help.

I want to show report for a particular month, selected by user.

I create stateless form for month input, with Submit button; all works well.

Now, from onClick deluge script, I plan to launch an existing report. What is syntax to do it?

Second question: how can I send a parameter (month number) to a report, and how can I use this parameter inside report scripts, what will be a name for this parameter?