onChange triggered by Javascript

**Cainnech** · Apr 4 '10, 12:57 AM

Am I right to assume that such a function can only be called from inside the element?

Because in this code:

Code:

<SELECT id=results_select_meeting jQuery1270339382734="153">

I don't see any onchange call?
Can anybody tell me how this is done then?

**Dormilich** · Apr 4 '10, 01:00 AM

Originally posted by Cainnech

Am I right to assume that such a function can only be called from inside the element?

no.

my guess is it’s called somewhere in the self-written part using jQuery.

**Cainnech** · Apr 4 '10, 01:34 AM

Well I'm afraid I have no idea where to look.

I'm attaching two .txt-files here hoping that someone here has a clue where the function is located.

Any help is appreciated.

Attached Files

**Cainnech** · Apr 4 '10, 06:40 PM

does anybody know of a way to log the functions that are being called on a page?

I would like to log all operations that the page does in an effort to discover what function is displaying the content.

**Dormilich** · Apr 4 '10, 08:00 PM

use Firebug for that.

**ÜnLoCo** · Apr 4 '10, 08:19 PM

Firebug and then inline code finder if you want

but for jQuery it's goes something like this :

element.change( function(){//do it})
you'll probably be looking for this code

$('select').cha nge( function(){//getContent} )
just take a look at their js.

more info http://api.jquery.com/change/

**Cainnech** · Apr 5 '10, 03:34 AM

I tried Firebug but I'm afraid it's not of any use because the page that I want to inspect is an online page so I can't add the javascript library to it.

Can I ask that anyone take a look at this because this is the only thing blocking me. So I can't move ahead.

The url of the page I'm scraping is http://form.horseracing.betfair.com/timeform and it's on the tab Results.

Thanks!

**Cainnech** · Apr 5 '10, 12:23 PM

I would like to try to trigger the onchange using jQuery.

Code:

$('#results_select_meeting').trigger("onchange");

But how can I perform this command from my parent window while it's the iFrame that is jQuery enabled and not the parent frame?

**Cainnech** · Apr 5 '10, 05:54 PM

Guys, I'm getting pretty desperate here.

Is there any other forum where there are some good jQuery experts that might be able to help me?

This is the code I'm using for my HTA.
When you run it, got to the tab Results to see where the select is that I'm using.

Code:

<html>
<head>
<script src="http://form.horseracing.betfair.com/static/js/jquery-1.2.3.min.js" type="text/javascript" charset="utf-8"></script>
    
<script language="javascript">

function test()
{
document.getElementById('scrapeframe').contentWindow.document.getElementById('results_select_meeting').selectedIndex = 2;
}
</script>
</head>
<body>
<input type="button" value=" TEST " onclick="test();">
<br>
<iframe width="1000px" height="800px" id="scrapeframe" src="http://form.horseracing.betfair.com/" application="yes"></iframe>
</body>
</html>

I refuse to believe that there is no way to simulate an onchange event in jQuery.
I just don't know how. So if anyone can test this on my code, that would be great.

**Cainnech** · Apr 15 '10, 12:30 AM

A small update

Due to the fact that this was an extremely difficult problem to which nobody knew the answer, I ended up "fooling" the application that there was someone who was actually selecting the option by hand.

Code:

document.getElementById('scrapeframe').contentWindow.document.getElementById('results_select_race_time').selectedIndex = index + 1;
document.getElementById('scrapeframe').contentWindow.document.getElementById('results_select_race_time').focus(document.getElementById('scrapeframe').contentWindow.document.getElementById('results_select_race_time').options[index + 1].value);

function up()
{
    var WshShell = new ActiveXObject("WScript.Shell");
    WshShell.AppActivate("Races");
    WshShell.SendKeys ("{UP}");
}

So this way the application selects the value below the one I actually need, it puts the focus on that option and then I simulate a keypress UP. As if a user was pressing the up key.

Might not be graceful, but hey, it works and that's the most important thing.

onChange triggered by Javascript

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