Selenium onChange not working - events

Question

I have tried a number of things to try and get Selenium to pick up an 'onchange' event from a drop down menu, none of which has worked.
The offending HTML is:
<select onchange="doOpperation(this.options[this.selectedIndex]); this.selectedIndex = 0;" name="opps_ondemand" id="opps_ondemand">
<option value="none" id="ondemand">Mark as...</option>
<option cmd="blah1" value="add">Something</option>
<option cmd="blah2" value="remove">None</option>
</select>
I have read that Selenium IDE doesn't record some on* events, and so it would be wise to use fireEvent():
$this->click("opps_ondemand");
$this->select("opps_ondemand", "label=Mark as...");
$this->click("//option[#value='add']");
sleep(3);
$this->fireEvent("//select[#id='opps_ondemand']", "change");
However, this does not work (with or without the fireEvent). I have also tried using
$this->fireEvent("locator", "click");
instead of
$this->click("locator");
but this did nothing.
Selenium does not complain about these locators not existing so I am assuming it can see the select/option elements fine. The problem seems to be the onChange event.
Does anyone know how to resolve this?
Thanks.

Answer 1

I encountered exactly this problem, but in IE only (Firefox and Google Chrome works fine for me)
I found the solution to be manually forcing the update using JavaScript through Selenium's runScript. Some ways to do that can be found here:
How do I programmatically force an onchange event on an input?
For example, if I have jQuery in my Web page, I would do this:
$this->select('IDOfSelectElement', '*some label*');
$this->runScript("$('#IDOfSelectElement').trigger('change')");

Answer 2

tried this?
$this->fireEvent("opps_ondemand", "onchange");
fireEvent(element_id, event_to_trigger);