FAQ Topic - How do I check to see if a childwindow is open, before opening another?

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FAQ Topic - How do I check to see if a childwindow is
open, before opening another?
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var myWin=null;
function openWin(aURL) {
if (!myWin || myWin.closed ) {
myWin=window.open(aURL,'myWin');
} else{
myWin.location=aURL;
myWin.focus();
}
}

http://msdn.microsoft.com/workshop/a...ies/closed.asp

http://docs.sun.com/source/816-6408-...ow.htm#1201877


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re: FAQ Topic - How do I check to see if a childwindow is open, before opening another?

In comp.lang.javascript message <45d4f406$0$90267$14726298@news.sunsite.
dk>, Fri, 16 Feb 2007 00:00:01, FAQ server <javascript@dotinternet.be>
posted:The code, which is accompanied only by links, answers the question "How
do I check to see if the specific childwindow 'myWin' exists and is
open, open it if it exists and is closed, and otherwise create and
focus it ?", which is a different question. Either the question or the
answer should be changed.

I suppose there should be a way of enumerating childwindows; then one
can test to see which are open and which are not.

--
(c) John Stockton, Surrey, UK. ?@merlyn.demon.co.uk DOS 3.3, 6.20 ; WinXP.
Web <URL:http://www.merlyn.demon.co.uk/- FAQqish topics, acronyms & links.
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re: FAQ Topic - How do I check to see if a childwindow is open, before opening another?

Dr J R Stockton wrote:Is there any standard way of doing this?

The only way I can think of offhand to do this would be to:

create your child windows
iterate the parent.window
check for like-named variables, e.g. childWin1, childWin2,
childWinDisplayResults, childWinError

I imagine using a RegExp might be the best method. I am not sure
whether or not creating one long string then using slice, indexOf,
lastIndexOf or substring or whatever, would be faster.

I normally get no more than 90 to 125 lines of properties, objects,
variables, default methods, defined methods, et cetera, if that makes
any difference.

Any ideas?

--
-Lost
Remove the extra words to reply by e-mail. Don't e-mail me. I am
kidding. No I am not.

re: FAQ Topic - How do I check to see if a childwindow is open, before opening another?

-Lost said the following on 4/24/2007 2:23 AM:No.
It won't work.
Sure. Are you just bored or do you have some reason for replying to
months old posts on a regular basis?

--
Randy
Chance Favors The Prepared Mind
comp.lang.javascript FAQ - http://jibbering.com/faq/index.html
Javascript Best Practices - http://www.JavascriptToolbox.com/bestpractices/

re: FAQ Topic - How do I check to see if a childwindow is open, before opening another?

Randy Webb wrote:Sorry about that. I guess its boredom. I spend quite a bit of time
perusing the archives when I cannot sleep.

I saw this and liked the idea proposed by Stockton so I figured respond
to it in the hopes of getting some good ideas/code out of it.

I'll refrain from further FAQ replies and older posts. Sorry.

--
-Lost
Remove the extra words to reply by e-mail. Don't e-mail me. I am
kidding. No I am not.

re: FAQ Topic - How do I check to see if a childwindow is open, before opening another?

-Lost said the following on 4/24/2007 2:25 PM:No problem with that, I was just curious more than anything else.
The idea (both yours and his) has a little merit but not a lot as it may
not even be your code that created the window. You could try going
through all non-native properties of the window object and testing them
but I doubt you could ever find a sufficient test to tell you if myVar
referred to a new window or not.
Nah, post away. It kills the boredom.

--
Randy
Chance Favors The Prepared Mind
comp.lang.javascript FAQ - http://jibbering.com/faq/index.html
Javascript Best Practices - http://www.JavascriptToolbox.com/bestpractices/

re: FAQ Topic - How do I check to see if a childwindow is open, before opening another?

In comp.lang.javascript message <L6ydnXzbxfz81rPbnZ2dnUVZ_ruknZ2d@comcas
t.com>, Tue, 24 Apr 2007 14:25:14, -Lost <maventheextrawords@techie.com>
posted:If you configure your attribution line to include the date of what you
are quoting, we will easily see the age of the previous article. That
will be helpful - though one should only respond to ancient articles if
the response will be useful now.

--
(c) John Stockton, Surrey, UK. REPLYyyww merlyn demon co uk Turnpike 6.05.
Web <URL:http://www.uwasa.fi/~ts/http/tsfaq.html-Timo Salmi: Usenet Q&A.
Web <URL:http://www.merlyn.demon.co.uk/news-use.htm: about usage of News.
No Encoding. Quotes precede replies. Snip well. Write clearly. Mail no News.