Avoid Alert window on close/Problem getting serious

Question

A website button on click opens a Link.swf.
The Link.swf on init opens a PopUp in Full size. Perfect.
But now, I have under my PopUp window the useless Link.swf.
I want to get rid of it.
The code in my Link.swf is:
getURL ("javascript:var myWin; if(!myWin ||
myWin.closed){myWin = window.open('" + address + "','" + winName +
"','" + "width=" + w + ",height=" + h + ",fullscreen=" + fullscreen
+ ",toolbar=" + toolbar + ",top='+((screen.height/2)-(" + h/2 +
"))+',left='+((screen.width/2)-(" + w/2 + "))+'" +
"')}else{myWin.focus();};self.close();");
It wants to close the Link.swf, but…
an Alert window appears, asking if I really want to close
>Yes or No<
How can I avoid this Alerter, just close the Browser???
Thank you for your help.

Answer 1

Thank you GWD for the tip.
I looked around in "javascript" articles, but haven't found a
proper solution.It seems, that the problem I am having here is not
that easy to solve.
If you like, see:
http://www.accessify.com/features/tutorials/the-perfect-popup/
or
http://www.quirksmode.org/js/croswin.html
Some code might be useful, but I really don't know how to
include it in my getUrl string.
It looks like, that I should include a javacode in my Html
and call the func from Flash??
Thanks,
Luciewong