how to generate new input fields based upon a text field value?

[eluser]towki[/eluser]
[quote author="solid9" date="1351321032"]You need to learn jQuery for this,
http://www.mkyong.com/jquery/how-to-add-...th-jquery/

[/quote]

I have tried to this to my code and it works fine but however when i click my SAVE button and the form doesnt send because of validation errors, the generated fields resets itself so the data which i have entered lately are gone. There is no problem in my own created fields because i managed this issue in my php code.