First of all, the problem is not related to ASP.NET which does not have access to the client systems. It's just JavaScript. If I'm not much mistaken, you cannot hide it for existing windows, you can only define some options when you create a pop-up window using
window.open
:
http://www.w3schools.com/jsref/met_win_open.asp[
^].
But even if you do that… many users these days use such settings to block all or some kinds of pop-ups, and the idea to hide the address bar can also be considered questionable, an attempt to limit natural user's rights, considered as abuse, so, even though both things could be acceptable, think twice.
—SA