middle click to open url in new session

[Leo <sdl.web@xxxxxxxxx>]

Hi all,

I want to bind mouse-2 to open url in new session. I tried

  (define-key w3m-mode-map [mouse-2] 'w3m-view-this-url-new-session)

But then, mouse-1 also opens url in new session. Any ideas?

Thanks,
-- 
Leo <sdl.web AT gmail.com>                         (GPG Key: 9283AA3F)