selecting combobox value that are hidden

[Ram]

I have a page that has radio button and also combo box (US places as option). The combo box is connected to the radio button. By default I don't see any options in the combo box. When I click on the radio button I get all the options in the combo box.

I have written the script to select radio button and also written the script selecting the combo box but combo box doesn't seem to select required value. In the combo box "byValue" & "byText" didn't work, the "byIndex" worked but this can't be used as I don't know in which index a particular place can be..How do you go about selecting a value that is hidden.

Attached HTML page for your reference cmatch.html

and this is what I have done.

For Radio Button

$oFrame = _IEFrameGetObjByName ($oIE, "matching")
$oForm = _IEFormGetObjByName ($oFrame, "matching")

_IEFormElementRadioSelect ($oForm, "bavailcountry", "bavailcountry", 1, "byValue")

For Combo Box

$opFrame = _IEFrameGetObjByName ($oIE, "matching")
$opForm = _IEFormGetObjByName ($opFrame, "matching")
$opSelect = _IEFormElementGetObjByName ($opForm, "bplace")

_IEFormElementOptionselect ($opSelect, "Boston MA", 1, "byText")