Question: I use HtmlUnit to fill form.
I have a select `SELECT_A`. After selecting option the additional elements must appear in the page. But it's not working! I simulate Firefox 3.6.

What do you think?

I tried to use `NicelyResynchronizingAjaxController()` but it does not help.

Answer: 
One note: fireEvent should be called with `"change"` parameter, not `"onchange"`. Or `fireEvent(Event.TYPE_CHANGE);` is even better.
You can use the method `fireevent("EventName")` and pass eventname as a paramenter:

```
HtmlSelect fromselect = form.getSelectByName("droplist");
fromselect.fireEvent("onchange");

```