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Hi All,

If I embed this in a web page, I get a popup window that should make
the windows beep sound. This works in InternetExploder, but on FireFox
I get no sound. Any idea why that would be?

<script>
alert("let there be sound");
</script>

TIA,
JohnO

On Wed, 2 Apr 2008 20:47:08 -0700 (PDT), in message <52f114b0-de67-4887-805e->,
JohnO wrote:

> If I embed this in a web page, I get a popup window

Which you do, of course.

> that should make
> the windows beep sound.

Er, _why_ should it make the windows beep sound?


> This works in InternetExploder, but on FireFox
> I get no sound. Any idea why that would be?

1. IE uses the Windows MessageBox API to show the pop-up.
The MessageBox API, as well as showing a pop-up, also makes a sound.

2. Firefox does not use the Windows MessageBox API for this.

3. There is no requirement to make a sound. This is simply one of the
differences between browsers.


> <script>
> alert("let there be sound");
> </script>
>
> TIA,
> JohnO


--
Cheers,
Ralph

On Apr 3, 9:00*pm, Ralph Fox <-rf-...@-.invalid> wrote:
> On Wed, 2 Apr 2008 20:47:08 -0700 (PDT), in message <52f114b0-de67-4887-805e-2e8495466...@s8g2000prg.googlegroups.com>,
>
> JohnO wrote:
> > If I embed this in a web page, I get a popup window
>
> Which you do, of course.
>
> > that should make
> > the windows beep sound.
>
> Er, _why_ should it make the windows beep sound?
>
> > This works in InternetExploder, but on FireFox
> > I get no sound. Any idea why that would be?
>
> 1. *IE uses the Windows MessageBox API to show the pop-up.
> * * The MessageBox API, as well as showing a pop-up, also makes a sound.
>
> 2. *Firefox does not use the Windows MessageBox API for this.
>
> 3. *There is no requirement to make a sound. *This is simply one of the
> * * differences between browsers.
>
> > <script>
> > alert("let there be sound");
> > </script>
>
> > TIA,
> > JohnO
>
> --
> Cheers,
> Ralph

Ok, I can get around it by detecting the browser:
<SCRIPT>
var browser = navigator.appName;
if (browser=="Netscape")
{
java.awt.Toolkit.getDefaultToolkit().beep();
}
alert("Error Message");
</SCRIPT>

In article
<61ab2ff4-6946-464c-9433->, JohnO
did write:

> if (browser=="Netscape")

Yuk. Please, check directly for the functionality you need, not for some
purely informational name.

On Apr 4, 11:38 am, Lawrence D'Oliveiro <l...@geek-
central.gen.new_zealand> wrote:
> In article
> <61ab2ff4-6946-464c-9433-1b36814ba...@i12g2000prf.googlegroups.com>, JohnO
> did write:
>
> > if (browser=="Netscape")
>
> Yuk. Please, check directly for the functionality you need, not for some
> purely informational name.

Go on then, explain exactly how to do that, please.

In article
<8ab0c28f-08f1-410e-95ee->, JohnO
did write:

> On Apr 4, 11:38 am, Lawrence D'Oliveiro <l...@geek-
> central.gen.new_zealand> wrote:
>
>> In article
>> <61ab2ff4-6946-464c-9433-1b36814ba...@i12g2000prf.googlegroups.com>,
>> JohnO did write:
>>
>> > if (browser=="Netscape")
>>
>> Yuk. Please, check directly for the functionality you need, not for some
>> purely informational name.
>
> Go on then, explain exactly how to do that, please.

Check for the existence of those objects before trying to use them.

On Apr 4, 12:49*pm, Lawrence D'Oliveiro <l...@geek-
central.gen.new_zealand> wrote:
> In article
> <8ab0c28f-08f1-410e-95ee-32a2b2425...@i12g2000prf.googlegroups.com>, JohnO
> did write:
>
> > On Apr 4, 11:38 am, Lawrence D'Oliveiro <l...@geek-
> > central.gen.new_zealand> wrote:
>
> >> In article
> >> <61ab2ff4-6946-464c-9433-1b36814ba...@i12g2000prf.googlegroups.com>,
> >> JohnO did write:
>
> >> > if (browser=="Netscape")
>
> >> Yuk. Please, check directly for the functionality you need, not for some
> >> purely informational name.
>
> > Go on then, explain exactly how to do that, please.
>
> Check for the existence of those objects before trying to use them.

But it is not so much exisetnce of objects that I am interested in.
All the platforms support the alert() method, but not all of them make
a sound, and it doesn't seem to be documented which do. I have
determined that FF does not and IE does at the moment. So it appears
the test is about the browser not the objects.

In article
<3548e1a2-793f-418a-88ef->, JohnO
did write:

> On Apr 4, 12:49Â*pm, Lawrence D'Oliveiro <l...@geek-
> central.gen.new_zealand> wrote:
>> In article
>> <8ab0c28f-08f1-410e-95ee-32a2b2425...@i12g2000prf.googlegroups.com>,
>> JohnO did write:
>>
>> > On Apr 4, 11:38 am, Lawrence D'Oliveiro <l...@geek-
>> > central.gen.new_zealand> wrote:
>>
>> >> In article
>> >> <61ab2ff4-6946-464c-9433-1b36814ba...@i12g2000prf.googlegroups.com>,
>> >> JohnO did write:
>>
>> >> > if (browser=="Netscape")
>>
>> >> Yuk. Please, check directly for the functionality you need, not for
>> >> some purely informational name.
>>
>> > Go on then, explain exactly how to do that, please.
>>
>> Check for the existence of those objects before trying to use them.
>
> But it is not so much exisetnce of objects that I am interested in.
> All the platforms support the alert() method, but not all of them make
> a sound, and it doesn't seem to be documented which do. I have
> determined that FF does not and IE does at the moment. So it appears
> the test is about the browser not the objects.

But you are calling specific objects to get the sound, are you not?
Therefore, test for those objects.

On Apr 4, 4:20 pm, Lawrence D'Oliveiro <l...@geek-
central.gen.new_zealand> wrote:
> In article
> <3548e1a2-793f-418a-88ef-b2cf5c838...@s19g2000prg.googlegroups.com>, JohnO
> did write:
>
>
>
> > On Apr 4, 12:49 pm, Lawrence D'Oliveiro <l...@geek-
> > central.gen.new_zealand> wrote:
> >> In article
> >> <8ab0c28f-08f1-410e-95ee-32a2b2425...@i12g2000prf.googlegroups.com>,
> >> JohnO did write:
>
> >> > On Apr 4, 11:38 am, Lawrence D'Oliveiro <l...@geek-
> >> > central.gen.new_zealand> wrote:
>
> >> >> In article
> >> >> <61ab2ff4-6946-464c-9433-1b36814ba...@i12g2000prf.googlegroups.com>,
> >> >> JohnO did write:
>
> >> >> > if (browser=="Netscape")
>
> >> >> Yuk. Please, check directly for the functionality you need, not for
> >> >> some purely informational name.
>
> >> > Go on then, explain exactly how to do that, please.
>
> >> Check for the existence of those objects before trying to use them.
>
> > But it is not so much exisetnce of objects that I am interested in.
> > All the platforms support the alert() method, but not all of them make
> > a sound, and it doesn't seem to be documented which do. I have
> > determined that FF does not and IE does at the moment. So it appears
> > the test is about the browser not the objects.
>
> But you are calling specific objects to get the sound, are you not?
> Therefore, test for those objects.

The object that I am interested in is the alert() method of the
javascript Window object and that is there in all cases, so testing
for it's existence doesn't help me. My issue is that the alert()
method on non IE browsers is silent so I need to know what the browser
is, not whether the object exists.

Do you mean testing for the existence of the java objects? Interesting
but probably not the solution as they could be there whether the
alert() method is silent or not.

Anyway, how do you test for existence of an object? Reference it and
catch an exception if it is not there?

On Apr 4, 1:13*pm, JohnO <johno1...@gmail.com> wrote:
> On Apr 4, 12:49*pm, Lawrence D'Oliveiro <l...@geek-
>
>
>
>
>
> central.gen.new_zealand> wrote:
> > In article
> > <8ab0c28f-08f1-410e-95ee-32a2b2425...@i12g2000prf.googlegroups.com>, JohnO
> > did write:
>
> > > On Apr 4, 11:38 am, Lawrence D'Oliveiro <l...@geek-
> > > central.gen.new_zealand> wrote:
>
> > >> In article
> > >> <61ab2ff4-6946-464c-9433-1b36814ba...@i12g2000prf.googlegroups.com>,
> > >> JohnO did write:
>
> > >> > if (browser=="Netscape")
>
> > >> Yuk. Please, check directly for the functionality you need, not for some
> > >> purely informational name.
>
> > > Go on then, explain exactly how to do that, please.
>
> > Check for the existence of those objects before trying to use them.
>
> But it is not so much exisetnce of objects that I am interested in.
> All the platforms support the alert() method, but not all of them make
> a sound, and it doesn't seem to be documented which do. I have
> determined that FF does not and IE does at the moment. So it appears
> the test is about the browser not the objects.- Hide quoted text -
>
> - Show quoted text -

If the object doesn't exist then code execution will fail, so it's a
good idea to check. The point is not to assume. You want to do
something like this:

<script language="javascript">
function alertWithBeep(s) {
if( navigator.appName=="Netscape" && typeof(java)=="object") {
java.awt.Toolkit.getDefaultToolkit().beep();
}
alert(s);
}

// test!
alertWithBeep("HI!");
</script>

So it only tries to 'beep' if we think the browser is Netscape and the
java object exists.