Sorry my jsbin link is leading to the wrong example.
Try to use the selectionChange event instead of "change":
<ComboBox id="system" selectedKey="2014" selectionChange="selectModel">
...
Sorry my jsbin link is leading to the wrong example.
Try to use the selectionChange event instead of "change":
<ComboBox id="system" selectedKey="2014" selectionChange="selectModel">
...