title: Create web application with ajax from the beginning or add ajax later?
body: <p>I'm working on my first Ruby on Rails aplication and it's quite big (at least for me ;) - database has about 25 tables). I'm still learning Ruby and Rails and I never wrote anything in Javascript nor Ajax.</p>
  
  <p>Should I add Ajax to my application from the beginning? Or maybe it will be better to add it latter? </p>
  
  <p>Or in the other words: is it (relatively) easy to add ajax to existing web application?</p>