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  var linkRewriter = function(old_domain, new_domain) {
    $('a[href*="' + old_domain + '"]').each(function() {
      if ($(this).attr('href') == old_domain ) {
        $(this).attr('href', $(this).attr('href').replace(old_domain, new_domain));
      }
    });
  };
     
  linkRewriter('www.olddomain.com', 'www.newdomain.com');