Opera shows up bad code?

[Geoff Cox]

Hello,

I have just tried using the latest version of Opera on some code which
works OK with IE, FF and Safari but there is probably a better way of
writing the code.

A sound is played when the play image is clicked and then the user has
the choice of 2 images to answer a question.

The code below deals with the first of the 2 images which can be
clicked to answer the question. The other function is similar.
function checkThisFirst( what) {

var x = what.id;
var first_part_id = x.substring(0,2 );
result[count] = "first";
document.getEle mentById('test' +count).classNa me = 'hiddenDiv2';
// line above - play image made invisible
document.getEle mentById('test' +count+'1').cla ssName = 'hiddenDiv2';
// line above - the first and second images made invisible
if (count<4) {
document.getEle mentById('test' +(count+1)).cla ssName = 'visibleDiv2';
/ /line above - the next play button made visible
}

}

There are 4 sounds to be played so I need to get

result[1] to result[4]

Opera shows up the problem (?) in that the title Test 4 does not
become invisible after the 4th choice has been made as do Tests 1 to
Test 3 titles. With IE, FF and Safari Test 4 does become invisible.

Better way of dealing with the count equals 4 situation?

Thanks

Geoff

PS I hope I have made this clear - if not will post more of the code.

[Dr J R Stockton]

In comp.lang.javas cript message <s17224hqkoedj1 83sumpubol27398 hsnrj@4ax.
com>, Wed, 7 May 2008 04:21:04, Geoff Cox <gc**@freeuk.no tcomposted:

>
I have just tried using the latest version of Opera on some code which
works OK with IE, FF and Safari but there is probably a better way of
writing the code.

Latest? Does that mean Version 9.27, or Mini 4, or Opera Mobile, or
some beta version? I see 9.5 beta is available.

What does (in 9.27; maybe similar in 9.5) Tools Advanced, Error Console
show?

Safari is now 3.1.1.

--
(c) John Stockton, nr London UK. ?@merlyn.demon. co.uk Turnpike v6.05 MIME.
<URL:http://www.merlyn.demo n.co.uk/TP/BP/Delphi/&c., FAQqy topics & links;
<URL:http://www.merlyn.demo n.co.uk/clpb-faq.txt RAH Prins : c.l.p.b mFAQ;
<URL:ftp://garbo.uwasa.fi/pc/link/tsfaqp.zipTimo Salmi's Turbo Pascal FAQ.

[Geoff Cox]

On Wed, 7 May 2008 19:05:28 +0100, Dr J R Stockton
<jr*@merlyn.dem on.co.ukwrote:

>In comp.lang.javas cript message <s17224hqkoedj1 83sumpubol27398 hsnrj@4ax.
com>, Wed, 7 May 2008 04:21:04, Geoff Cox <gc**@freeuk.no tcomposted:

>>
I have just tried using the latest version of Opera on some code which
works OK with IE, FF and Safari but there is probably a better way of
writing the code.

Latest? Does that mean Version 9.27, or Mini 4, or Opera Mobile, or
some beta version? I see 9.5 beta is available.

What does (in 9.27; maybe similar in 9.5) Tools Advanced, Error Console
show?

Safari is now 3.1.1.

Thanks for your reply John,

It is Opera on my PC, is version 9.27 build 8841.

I was wrong in saying that the last Title doesn't become invisible, it
does but is very slow to do so. Also the images may take 3-4 seconds
to come up and some times when I click on them it takes 3-4 seconds
for the onClick to happen.

The error console shows the following - any idea how I check on

"message: Security error: attempted to read protected variable" or any
other thoughts?

Cheers

Geoff
JavaScript - http://www.site.com/files/group1/group1-lab1.htm
Unknown thread
Error:
name: ReferenceError
message: Security error: attempted to read protected variable
CSS - http://www.site.com/files/group1/group1-lab2.htm
Inlined stylesheet
-khtml-opacity is an unknown property
Line 6:
-khtml-opacity: 0.40;
----------------^
CSS - http://www.site.com/files/group1/group1-lab2.htm
Inlined stylesheet
-moz-opacity is an unknown property
Line 7:
-moz-opacity: 0.40;
--------------------------^
JavaScript - http://www.site.com/files/group1/group1-lab2.htm
Unknown thread
Error:
name: ReferenceError
message: Security error: attempted to read protected variable
JavaScript - http://www.site.com/files/group1/group1-lab3.htm
Unknown thread
Error:
name: ReferenceError
message: Security error: attempted to read protected variable

[Geoff Cox]

On Wed, 7 May 2008 19:05:28 +0100, Dr J R Stockton
<jr*@merlyn.dem on.co.ukwrote:

John,

I have just read elsewhere that getting data from a foreign domain is
a security violation for Javascript - this true? If so then I may have
a problem as the audio files come form another server - the idea being
that this would be more robust in the event of losts of users
accessing the site at the same time.

Could the foreign domain (www.site.com) explain this Opera error
message?

JavaScript - http://www.site.com/files/group1/group1-lab2.htm
Unknown thread
Error:
name: ReferenceError
message: Security error: attempted to read protected variable
JavaScript - http://www.site.com/files/group1/group1-lab3.htm
Unknown thread
Error:
name: ReferenceError
message: Security error: attempted to read protected variable

Any way round this?

Cheers

Geoff

[Geoff Cox]

On Wed, 7 May 2008 19:05:28 +0100, Dr J R Stockton
<jr*@merlyn.dem on.co.ukwrote:

John,

I have changed so that the audio files are now taken from the same
server as the rest of the pages but get an error message with Opera

JavaScript - http://www.mysite.com/files/group1-lab3.htm
Unknown thread
Error:
name: ReferenceError
message: Security error: attempted to read protected variable

The images are slow to respond to onClick event.

Any thought on how I investigate this?!

Cheers

Geoff