Put a script trigger on the radio button to commit the record when the field is modified.
If this field is part of a portal filter expression, use an OnModify trigger to do: Refresh Window [Flush cached Join results] to force the portal to re-filter.
I am very new to filemaker .Can you please guide me with any articles on how to create triggers.Also i have tried adding few scripts for setting the variables by selecting the Button setup and set field or perform script.If i do that my radio button are freezing they are not letting to modify the existing selection options.
Triggers require FileMaker 10 or 11.
For a layout object, you can enter layout mode, right click the object and then select Script Triggers from the menu that pops up. You can also find this option in the Format menu when you are in layout mode. In Layout Setup... you can specify triggers for the entire layout. It will also be useful to look up script trigger in FileMaker help to get a good overview of what triggers exist and how they work.