/**
 * redirect links marked as external (rel="external") to new window
 *
 * @author Gijs Nieuwenhuis <gijs.nieuwenhuis@freshheads.com>
 */
var external =
{
  /**
   * init function
   */
  init : function()
  {
    var links = $$('a');
    
    if(links)
    {
      for(var i = 0; i < links.length; i++)
      {
        if(links[i].rel == 'external')        
          links[i].target = '_blank';
      }
    }    
  } 
}

Event.observe(window, 'load', function(){ external.init(); });