Portal Form

Hi All,

I have worked with Tempo forms, i need edit a portal form to add a validation on number of characters in a field.
I was able to achive giving a message saying you have crossed the allowed limit, but i want to add by how much they have exceeded.
For ex:-If character limit is 20 if user enters 25 character i want you show a message you have exceeded the limit by 5 characters.
I couldn't get the entered value in validation message as window api doesn't work nor it is saving into the activity class parameter used to save in the form.
Appreciate your help.

OriginalPostID-231190