I use ruby on Rails and by the way prototype.js.
I have the following generated code from the framework:

new Form.Element.EventObserver('mycomp_id', function(element, value)
{new Ajax.Request('/commands/updatereferences', {asynchronous:true,
evalScripts:true, parameters:'expr=' + $('mycomp_id').value +
'&authenticity_token=' + encodeURIComponent

The aim is to register an event listener on a combo box and update the
page via ajax when a user change the selected value. All this is
working great.

The problem is that I need to change the selected value in the combo
box using javascript and doing this, no event is fired. The value is
changed but my page is not updated.

Is there a way to notify the observer that the value has changed?

Thanks in advance for your help.

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