WebRadioGroup.SelectByCaption
From Xojo Documentation
Method
WebRadioGroup.SelectByCaption(Caption As String)
New in 2010r4
Supported for all project types and targets.
New in 2010r4
Supported for all project types and targets.
Selects the radio button who has the passed Caption. If no radio button is found with the specified caption, this call does nothing.
Example
The following line selects the second radiobutton in the default WebRadioGroup.
RadioGroup1.SelectByCaption("Second")