At this time we don't offer such functionality in the forms module. There is a current PITS
item that you can vote for its popularity and raise its importance.
Please let us know if you have anymore questions.
the Telerik team
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items