In general, you can never guarantee that the user will not see the window functions that you ask to hide, because some browsers (Firefox, I know, and possibly others) allow the browser user to control which functions can be disabled. In addition, some plugins add toolbars and do not pay attention to these options on window.open .
However, this option usually works, as I have successfully used it, and works in interacting browsers (including all versions of IE that I tried).
edit - I just tried a quick test and it seems to work fine in Chrome and IE. Chrome now shows a small indicator area at the top of the window that shows the URL, but it's not really a complete "location" panel.
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