Detection of file edit dates

[howardg]

I was wanting to use Javascript to detect the edit date on a series
of .jpg files, and return that date in the corresponding HTML page,
as in "Chart was last updated...". Does anyone know if this is
possible, and if so how I would go about it?
Many thanks
Graham

[erikd]

On 29 Nov 2004 17:04:18 +1300, ho*****@rbnz.govt.nz wrote:

I was wanting to use Javascript to detect the edit date on a series
of .jpg files, and return that date in the corresponding HTML page,
as in "Chart was last updated...". Does anyone know if this is
possible, and if so how I would go about it?

I'm using a modified version of a script located at
http://www.cgiscript.net/site_javascripts_date_time.htm to do it for
the page, it should be possible to do the same for a file.

--
Erik

[Dr John Stockton]

JRS: In article <Xn*******************************@172.27.20.6>, dated
Mon, 29 Nov 2004 17:04:18, seen in news:comp.lang.javascript,
ho*****@rbnz.govt.nz posted :

I was wanting to use Javascript to detect the edit date on a series
of .jpg files, and return that date in the corresponding HTML page,
as in "Chart was last updated...". Does anyone know if this is
possible, and if so how I would go about it?

If you use 32-bit Windows, and perhaps even if not, you can use
Javascript in WSH to get the dates and to edit the HTML page; that
answers your first question as stated.

To answer your intended question, I doubted it. Testing locally, I see
that document.images[0].fileCreatedDate does show me a date string
(not necessarily correct), so something like that *might* work on the
Web for images that have actually been fetched.

But for annotating links to images that might be fetched ...

--
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<URL:http://www.jibbering.com/faq/> JL/RC: FAQ of news:comp.lang.javascript
<URL:http://www.merlyn.demon.co.uk/js-index.htm> jscr maths, dates, sources.
<URL:http://www.merlyn.demon.co.uk/> TP/BP/Delphi/jscr/&c, FAQ items, links.

[howardg]

Dr John Stockton <sp**@merlyn.demon.co.uk> wrote in
news:3r**************@merlyn.demon.co.uk:

I was wanting to use Javascript to detect the edit date on a series
of .jpg files, and return that date in the corresponding HTML page,
as in "Chart was last updated...". Does anyone know if this is
possible, and if so how I would go about it?

If you use 32-bit Windows, and perhaps even if not, you can use
Javascript in WSH to get the dates and to edit the HTML page; that
answers your first question as stated.

To answer your intended question, I doubted it. Testing locally, I see
that document.images[0].fileCreatedDate does show me a date string
(not necessarily correct), so something like that *might* work on the
Web for images that have actually been fetched.

Thanks for your reply - i'm a bit of a novice at this - are you able to
be more specific in terms of the possible code for referencing a jpeg? Thanks
again.

[RobB]

ho*****@rbnz.govt.nz wrote in message news:<Xn*******************************@172.27.20. 6>...

Dr John Stockton <sp**@merlyn.demon.co.uk> wrote in
news:3r**************@merlyn.demon.co.uk:

I was wanting to use Javascript to detect the edit date on a series
of .jpg files, and return that date in the corresponding HTML page,
as in "Chart was last updated...". Does anyone know if this is
possible, and if so how I would go about it?

If you use 32-bit Windows, and perhaps even if not, you can use
Javascript in WSH to get the dates and to edit the HTML page; that
answers your first question as stated.

To answer your intended question, I doubted it. Testing locally, I see
that document.images[0].fileCreatedDate does show me a date string
(not necessarily correct), so something like that *might* work on the
Web for images that have actually been fetched.

Thanks for your reply - i'm a bit of a novice at this - are you able to
be more specific in terms of the possible code for referencing a jpeg? Thanks
again.

The properties you'd be interested in - fileModifiedDate /
fileUpdatedDate are generally, by specification, members of Document
objects, not Image objects. MSIE, naturally, breaks the pattern,
making these available client-side for pix as well.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>untitled</title>
<script type="text/javascript">
//<![CDATA[

onload = function()
{
var img = document.getElementById('foo');
var s1 = document.createTextNode('Last updated: ' +
(img.fileUpdatedDate || 'unknown'));
var s2 = document.createTextNode('Last modified: ' +
(img.fileModifiedDate || 'unknown'));
var d = document.getElementById('box');
d.appendChild(s1);
d.appendChild(document.createElement('hr'));
d.appendChild(s2);
}

//]]>
</script>
</head>
<body>
<div id="box" style="width:200px;font:14px monospace;">
<img id="foo" src="http://www.geocities.com/area51/rampart/4503/acon/banana.jpg"
/>
</div>
</body>
</html>

[Dr John Stockton]

JRS: In article <Xn*******************************@172.27.20.6>, dated
Tue, 30 Nov 2004 13:01:09, seen in news:comp.lang.javascript,
ho*****@rbnz.govt.nz posted :

Dr John Stockton <sp**@merlyn.demon.co.uk> wrote in
news:3r**************@merlyn.demon.co.uk:

I was wanting to use Javascript to detect the edit date on a series
of .jpg files, and return that date in the corresponding HTML page,
as in "Chart was last updated...". Does anyone know if this is
possible, and if so how I would go about it?

If you use 32-bit Windows, and perhaps even if not, you can use
Javascript in WSH to get the dates and to edit the HTML page; that
answers your first question as stated.

To answer your intended question, I doubted it. Testing locally, I see
that document.images[0].fileCreatedDate does show me a date string
(not necessarily correct), so something like that *might* work on the
Web for images that have actually been fetched.

Thanks for your reply - i'm a bit of a novice at this - are you able to
be more specific in terms of the possible code for referencing a jpeg? Thanks
again.

If I had known more, I would have written more.

--
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[howardg]

That's helpful, thanks very much!