browsers' differences in action on same code.

[Robert Dickow]

This code works perfectly in IExplorer, but in exactly the same context
does not work at all in Netscape 7.x.

<SCRIPT TYPE="text/javascript" LANGUAGE="JavaS cript">
<!--
if (window.parent. opener.closed)
{
window.parent.c lose();
};
// -->
</SCRIPT>

This is intended to detect the presence of an open parent window. When
one closes the open parent in IE, the child closes promply. In Netscape,
the inner loop is apparently not executed after the window is closed.
Reversing the logic on the opener test works fine as long as the window
is open. But, hey! Isn't ...opener.close d supposed to return something
if a window is closed? It seems to simply... fail. The inner loop will
not execute with either a negative or positive logic spin (!window...).

--
*************** *************** *****
* Bob Dickow (dickow@uidaho. edu) *
* Hampton School of Music *
*************** *************** *****

[Thomas 'PointedEars' Lahn]

Re: browsers' differences in action on same code.

Robert Dickow wrote:
[color=blue]
> This code works perfectly in IExplorer,[/color]

Sure? Maybe you have disabled the display of script errors.
[color=blue]
> <SCRIPT TYPE="text/javascript" LANGUAGE="JavaS cript">
> <!--
> if (window.parent. opener.closed)
> {
> window.parent.c lose();
> };
> // -->
> </SCRIPT>
>
> This is intended to detect the presence of an open parent window. When
> one closes the open parent in IE, the child closes promply.[/color]

Where is the event that triggers the above code?
[color=blue]
> In Netscape, the inner loop is apparently not executed[/color]

There is no (`if') loop! `if' is a conditional statement
and you defined a block of statements with `{...}' to be
executed if it evaluates to `true'.
[color=blue]
> after the window is closed.[/color]

Try

function foobar()
{
if (window.parent
&& window.parent.c lose
&& (!window.parent .opener || window.parent.o pener.closed))
window.parent.c lose();
}

and use the `unonload' event handler of the `body' element to call that
function. Note that the event also fires when the user displays another
document in the same window.


PointedEars

[Thomas 'PointedEars' Lahn]

Re: browsers' differences in action on same code.

(Have canceled my other posting, please consider it obsolete.)

Robert Dickow wrote:
[color=blue]
> This code works perfectly in IExplorer,[/color]

Sure? Maybe you have disabled the display of script errors.
[color=blue]
> <SCRIPT TYPE="text/javascript" LANGUAGE="JavaS cript">
> <!--
> if (window.parent. opener.closed)
> {
> window.parent.c lose();
> };
> // -->
> </SCRIPT>
>
> This is intended to detect the presence of an open parent window. When
> one closes the open parent in IE, the child closes promply.[/color]

Where is the event that triggers the above code?
[color=blue]
> In Netscape, the inner loop is apparently not executed[/color]

There is no (`if') loop! `if' is a conditional statement
and you defined a block of statements with `{...}' to be
executed if it evaluates to `true'.
[color=blue]
> after the window is closed.[/color]

Try

function foobar()
{
if (window.parent
&& window.parent.c lose
&& !window.parent. closed
&& (!window.parent .opener || window.parent.o pener.closed))
window.parent.c lose();
}

and use the `unonload' event handler of the `body' element to call that
function. Note that the event also fires when the user displays another
document in the same window.


PointedEars

[Michael Winter]

Re: browsers' differences in action on same code.

"Robert Dickow" wrote on 11/11/2003:
[color=blue]
> This code works perfectly in IExplorer, but in exactly the same[/color]
context[color=blue]
> does not work at all in Netscape 7.x.
>
> <SCRIPT TYPE="text/javascript" LANGUAGE="JavaS cript">[/color]

The 'language' attribute is depreciated in HTML and shouldn't be used.
You should also realise that "JavaScript " represents v1.0 of the
language. Netscape probably (read: double check with someone else)
interprets this religiously and neither 'opener' nor 'closed' were
introduced until v1.1.
[color=blue]
> <!--
> if (window.parent. opener.closed)
> {
> window.parent.c lose();
> };
> // -->
> </SCRIPT>
>
> This is intended to detect the presence of an open parent window.[/color]

I don't believe it does:

window
current window
window.parent
parent of the current window
window.parent.o pener
window that opened (using window.open) the parent of the current
window
window.parent.o pener.closed
true if the window that opened (using window.open) the parent of the
current window is closed

Are you sure that you're checking the correct window? You describe the
parent, not the parent of the parent.
[color=blue]
> When
> one closes the open parent in IE, the child closes promply. In[/color]
Netscape,[color=blue]
> the inner loop is apparently not executed after the window is[/color]
closed.[color=blue]
> Reversing the logic on the opener test works fine as long as the[/color]
window[color=blue]
> is open. But, hey! Isn't ...opener.close d supposed to return[/color]
something[color=blue]
> if a window is closed? It seems to simply... fail. The inner loop[/color]
will[color=blue]
> not execute with either a negative or positive logic spin[/color]
(!window...).

[Robert Dickow]

Re: browsers' differences in action on same code.

Thanks for the solution! The wonderfully byzantine test clause
solved the problem for Netscape. Turns out that it does ok
with the deprecated LANGUAGE="JavaS cript" in this case.

I don't use a trigger event for this at all; it is in the
midst of PHP code and it simply passed to the client
when a certain condition is present. This instantly closes
the client window.

Thomas 'PointedEars' Lahn <PointedEars@we b.de> wrote in
news:boqhv1$1gm 1qf$1@ID-107532.news.uni-berlin.de:
[color=blue]
> Robert Dickow wrote:
>[color=green]
>> This code works perfectly in IExplorer,[/color]
>
> Sure? Maybe you have disabled the display of script errors.
>[color=green]
>> <SCRIPT TYPE="text/javascript" LANGUAGE="JavaS cript">
>> <!--
>> if (window.parent. opener.closed)
>> {
>> window.parent.c lose();
>> };
>> // -->
>> </SCRIPT>
>>
>> This is intended to detect the presence of an open parent window.
>> When one closes the open parent in IE, the child closes promply.[/color]
>
> Where is the event that triggers the above code?
>[color=green]
>> In Netscape, the inner loop is apparently not executed[/color]
>
> There is no (`if') loop! `if' is a conditional statement
> and you defined a block of statements with `{...}' to be
> executed if it evaluates to `true'.
>[color=green]
>> after the window is closed.[/color]
>
> Try
>
> function foobar()
> {
> if (window.parent
> && window.parent.c lose
> && (!window.parent .opener || window.parent.o pener.closed))
> window.parent.c lose();
> }
>
> and use the `unonload' event handler of the `body' element to call
> that <snip>[/color]

--
*************** *************** *****
* Bob Dickow (dickow@uidaho. edu) *
* Hampton School of Music *
*************** *************** *****