Window.open() in new tab without focus

[sjachym]

Hello, I'm trying desperately to open a new page in a tab without
taking focus.

As it explain on http://forums.smartclient.com/showpost.php?p=31578&postcount=4
:

Using Window.open(url, name, features) with empty features, result
opening a new tab open WITH FOCUS.

Without features => new tab + focus
With no empty features parameters => new window + focus

How to open new window in new tab without focus ? (pop-up under)

Features aguments "alwaysLowered" and "z-lock" changes nothing...