jEditable: show the old value if the input value doesn't meet the requirements

jEditable: show the old value if the input value doesn't meet the requirements

Hi,

Is there a way to show the old value on the field if the user enters a wrong input? I'm thinking of showing a popup when the user enters a wrong value, and show the old value in the field. That way the user can see what was the old value. I'm having trouble in both showing the old value in the case when the user enters a wrong value and showing a popup. Any help would be appreciated.

Thanks