Can't get combo values

Hi,
I’m using free edition of your dhtmlxCombo.
But hovewer when I post my Form I can not see the combo’s value.
Maybe dhtmlxCombo’s value is taken by using JS ? If so how should I do that ?
Can you send me small example about how to get selected value of dhtmlxCombo ?

combo = object of combobox

combo.getSelectedValue();

Please see the sample with form submitting:

dhtmlxCombo/samples/02_actions/03_combo_save.html ( dhtmlx.com/docs/products/dht … _save.html )

Combo creates a hidden input automatically, its value is submitted.

The problem is with me.
My form was initialized with xml, so there’s no html tag, nor the onsubmit event.
So I’m adding onBeforeSend event to the form, but suddenly found that there’s no such event.
Finally, I add confirmValue() in the onBeforeValidate event. However, form.send still get combo value with null.
I tried to add confirmValue() to other events as onBeforeSave, onValidateSucess, and others, but still get null. When I debug into the codes, combo…getComboText() can get the actual value.
what’s wrong with my code?

Now I’m stuck here, and now using an alternate solution with jquery that collects form data manually, instead of automatical form.send.