At the moment (Chrome 39) I use this code to open a new tab:
window.open('http://www.stackoverflow.com', '_blank', 'toolbar=yes, location=yes, status=yes, menubar=yes, scrollbars=yes');
_x000D_
Of course this may change in future versions of Chrome.
It is a bad idea to use this if you can't control the browser your users are using. It may not work in future versions or with different settings.