title: Using Javascript on Ruby on rails
body: <p>I am trying to use update some calculations everytime a person modifies a text field. I have many question about how to know the id text field, how to store it in a variable, etc. I am a newbie with ruby and javascript and there are many questions. Could you please tell me where I can find more information that explains step by step how to proceed with this?</p>
  
  <p>Thank you very much.</p>