IE 10 has a bug
<https://connect.microsoft.com/IE/feedback/details/841043/blinking-text-cursor-overlapping-with-div>

But I need somehow remove blinking cursor in ZKoss `Combobox`. The primary idea is to remove focus from input and try to get it to popup list. I think that if focus will be removed, blinking curcor doesn't appears behind popup list.

How can I remove focus from combobox's input after the popup list appears? Is it possible?