Checking for an open window

[Sarky78]

Hi

I have got an advertisment page that will either open a new window if the advert is external to the website or change the current website page if the link is internal. What i want to be able to do is to check if the main website window is still open before executing the link to the internal web page to stop a javascript error that appears.

What i have at the moment is this:

function openAdvert(URL)
{
window.opener.location=URL;
window.opener.focus();
}

if the opener window has already been closed this is where i get the javascript error. Can i check to see if this window is still open ?

Thanks in advance

 

[baad]

hi
we have closed property:
if (!opener.closed){
...
} Victor

 

[Sarky78]

hi

tried that and it doesn't work, I used the following code and got an exception error on the !.opener.closed line

if (!opener.closed)
{
window.opener.location=URL;
closeup()
window.opener.focus();
}
else {
alert("Need to open a new window"
}

 

[GIGN]

Apparently you can also use an empty open call to get a reference to an already open window.


var openWindow = open();
if(openWindow) // window open already.

See if it works.

 

[Glowball]

Yep, that'll let you know that the window got opened, but if you want to check to see if it still exists try this one:

var openWindow = window.open(URL,"openWindow",""
openWindow.focus();

if (openWindow && openWindow.open) ...

You'll get an error if you check openWindow.open if openWindow doesn't exist, so you need to check that first.

 

[baad]

aprerry, what error exactly have you got?

this stuff worked for me allways, & it works now (ie6, nc4.61, nn6 win98) it failed in opera 5.12, but it wasn't surprising for me..

what browser did you used?

(i've checked with this function: )

function chfth(){
if (!opener.closed){
alert(opener+" "+opener.closed)
}
else alert("closed&quot
} Victor

 

[Sarky78]

Victor

regardless of if the opener window is still open or not i get an alert saying [object] false indicating that the window is closed even when it is open.

I am using ie 5 on win NT 4

Cheers

Tony

 

[baad]

no, wait, if i got it right, closed=false means that window is NOT closed (it is NOT true, it is FALSE)

so, alert(opener+" "+opener.closed)
would give you [object] false if opener is not closed, & otherwise (if the opener was closed, according to my test function) you'll get closed alert box Victor

 

[Sarky78]

what you say is correct, if the window is still open then i will get [object] false, but i am also getting this when the window is closed!!!

can you tell me a website where yo have used this script, unfortunatly i can't provide a webaddress for the page this is failing on as it is behind a load of security at the moment

 

[baad]

well, actually, i didn't used it.. as i told, it was for some guy (Oleg, as i remember)

but i can upload it to my server, & you'll checkif it would work for you...

i'll post here the url in a few minutes.. Victor