SELECT element in JS plugin does not open option list in mobile browsers when user touches this element

Hello.
I use krpano 1.19-pr8 and create a plugin with html div element that holds several SELECT elements. On desktop browsers when I click any of these SELECTS option list opens. But when I touch any of that elements with my finger on mobile device (Android) nothing happens. Option list does not open. Same for any mobile browser that I tried: Chrome, FF, Opera.

Does somebody know what's the trick with SELECT element in mobile browsers for krpano plugin?