title: Looking for a web based diff component
body: <p>In a content management system, moderators have to approve changes to existing articles. Currently the system shows the old and the revised version of the text in plain text. It is a pain to find the actual differences.</p>
  
  <p>In GoogleDocs, there is a 'Compare revisions' feature which highlights the differences between two documents. </p>
  
  <p>If there a free component out there that does the same thing?</p>
  
  <p>If not, would you write such a component in JavaScript or on the server side?</p>
  
  <p>All the usual diff tools are desktop applications.</p>