set selected item after reload page

I use combo on my post-form.
After use post-method I load form and set text of selected item by z.setComboValue, but item not selected. And if I repeat post-data I lose selected item.
So, that method I can use for select item in time of load?

Please, attach completed demo to reproduce your issue:
docs.dhtmlx.com/doku.php?id=othe … leted_demo

What sample do you mean?

I see samples, but didn’t see sample with subload combo.
If combo is not subload, I now - set “selected” in , but can do it in subload?

I done it.
z.setComboValue(person_id);
z.setComboText(<?="'".$name."'";?>);

I meant sanple of YOUR project. I gave you a link with guide ‘how to make completed demo’.
Sometimes we ask for such demo to reproduce issuess of our customers. It helps find some problems.