title: Change selected value in Javascript - Ruby
body: <p>I have a combo-box in view of RoR (Ruby 1.9) application like this:</p>
  
  <pre><code>&lt;%= collection_select(:source, :source_id, @objects, :id, :name, :selected =&gt;1)
  </code></pre>
  
  <p>I want to change the selected value in javascript. Does it possible? If yes, please show me a sample code about this.<br>
  Thanks.</p>