Question about repopulating fields in my form

[eluser]caole261188[/eluser]
Thank you, I never knew about this input library.
However what I'm asking is, how to fill in the form again with the information the user supplied before. For example, he fills out the form with some mistakes, and then when he submits he gets an error message with the form reloaded. But in my case, the fields are not refilled with information user presented before. Sorry for my English, I don't know how to state it more clearly