Urgent:Firing javascript on IHTLElement interface

[ranadhir]

We are parsing the html elements on a form and settings values on them programatically.
Suppose there is a SELECT element which has a javascript written on the 'onchange' event.
However,although we cant set the selected inex on the SELECT element programmatically,it does not seem to trigger off the corresponding javascript.

We are doign the following;
CComPtr<IHTMLSelectElement> spSelectElem;
HRESULT hr=pelem->QueryInterface(//Ask for an Select interface
IID_IHTMLSelectElement,(void **)&spSelectElem);
................................................
long idx;
std::stringstream ss(pevent.get_args());
ss >> idx;

hr=spSelectElem->put_selectedIndex(idx);


This lets us see the selected item changing but no javascript being fired.What do we need to do?