$(document).ready(function() {
  $('pre code').each(function(i, block) {
    hljs.highlightBlock(block);
  });

  $('#paste').on('change', function() {
    $('input[name=source]').val(['form']);
  });
  $('#upload').on('change', function() {
    $('input[name=source]').val(['file']);
  });
});