intelligent-back-link.js

/*global jQuery */
(function () {
  if (document.referrer) {
    var reg = new RegExp("https?:\/\/([^/]+)"),
      domain = reg.exec(window.location.href),
      refdomain = reg.exec(document.referrer);
    if (domain[1] === refdomain[1]) {
      jQuery('.back-link').click(function(){
        if (!document.referrer.match(new RegExp("edit/?(\?.+)?$"))) {
          window.history.go(-1);
          return false;
        }
      });
    }
    else {
      jQuery('.back-link.internal').hide();
    }
  }
})();