Username/password input goes to new URL

After inputting the correct username & password, the following ActionScript sends the user to frame 2 ("Code Snippet" line 7).  How can I modify it such that instead, upon user input of the correct username and password, the browser goes to a specific new URL in a new window?

stop();
var user_input = ""
var pass_input = ""
login_button.onRelease = function() {
	if (user_input == "username"
		&& pass_input == "password") {
		gotoAndStop(2);
	}
	else{
		gotoAndStop(3);
	}
}

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