title: backbone.js dependent fieldsets and dropdowns
body: <p>I'm working on a project where I have dependent fieldsets and dropdowns, and I'm wondering if backbone.js is a good way to go about this.</p>
  
  <p>The setup is like this:
  -fieldset A with dropdown A1
  -fieldset B with dropdowns B1 and B2</p>
  
  <p>Fieldset A and dropdown A1 should always be visible. On making a selection in dropdown A1, fieldset B and dropdown B1 should appear. On making a selection in dropdown B1, dropdown B2 should appear.</p>
  
  <p>Changing dropdown A1 should "reset" fieldset B and dropdown B1, and dropdown B2 should disappear.</p>
  
  <p>Though this example is limited to describing two fieldsets with dropdowns, there may be more, all dependent on selections made further "up the chain."</p>
  
  <p>Is backbone.js a good solution for this problem? If so, what's the best way to approach this setup?</p>