How to open a URL for current selected record from a button in a report.

How to open a URL for current selected record from a button in a report.

Hi, 

Can you tell me how to open a pop up window for the currently selected record when pressing a button from a row in a report? I've seen very old posts but none of the solutions seem to work for me.

Also how can i access details from another report on the same page so i can map items from one report to another by selecting rows from each report?

Thanks,