var initOutsideLinks = function()
{
  $$('a.external').each(function(el){
    el.target = '_blank';
    el.onclick = function() {
      return confirm('You are about to view a website outside of mercbanx.com. These links are intended to provide you with additional resources and information. Mercantile Bancorp, Inc. is not responsible for the maintenance or content of the information contained within the site(s). Please select OK to continue.');
    }
  }); 
}
Event.observe(window, 'load', initOutsideLinks );