Google Analytics beforeunload inpsection

ga-part.js

// this code isn't intended to work: 

if (J.body) {
        a = aa(a);
        try {
          var c = J[qa]('<iframe name="' + a + '"></iframe>')
        } catch (d) {
          c = J[qa]("iframe"), ha(c, a)
        }
        c.height = "0";
        c.width = "0";
        c.style.display = "none";
        c.style.visibility = "hidden";
        var e = J[z],
            e = ("https:" == J[z][A] || M.G ? "https://ssl.google-analytics.com" : "http://www.google-analytics.com") + "/u/post_iframe.html#" + aa(e[A] + "//" + e[u] + "/favicon.ico"),
            f = function() {
            c.src = "";
            c.parentNode && c.parentNode.removeChild(c)
            };
        Ga(W, "beforeunload", f);
        var Be = !1,
            k = 0,
            s = function() {
            if (!Be) {
              try {
                if (9 < k || c.contentWindow[z][u] == J[z][u]) {
                  Be = !0;
                  f();
                  Ha(W, "beforeunload", f);
                  b();
                  return
                }
              } catch (a) {}
              k++;
              ca(s, 200)
            }
            };
        Ga(c, "load", s);
        J.body.appendChild(c);
        c.src = e
      } else We(function() {
        Ee(a, b)
      }, 100)