$(document).ready(function() {
  $('a.colorbox').colorbox({
    maxHeight: '90%' ,
    title: function(){
      var url = $(this).children('span').text();
      var title = $(this).attr('title');
      return '<span class="colorbox-title-span">'+title+'</span><a class="original-link" href="'+url+'" target="_blank">View Original</a>';
    }
  });
});