Sample code for Aras Innovator that demonstrates how to open an older version of an item using a CUI button

labs_open_version_button.js

var generationDropdown = control.data.get("labs.part.ivcb.version_selector.dropdown");
var selectedId = generationDropdown.value;

var selItemQuery = aras.IomInnovator.newItem(options.itemTypeName, "get");
selItemQuery.setID(selectedId);
selItemQuery = selItemQuery.apply();

aras.uiShowItemEx(selItemQuery.node);