OnClientSelectedIndexChanging: get previously selected value

[G.]

I have a radcombox which is configured with

OnClientSelectedIndexChanging

 

 

="AllowSelectionChange"

In the AllowSelectionChange() javascript method....

 

    text = eventArgs.get_item().get_text();

appears to get the newly selected value...

How can I get the previously selected value?

[G.]

Its... sender.get_text().