display("Creating implicit global");

xxx = 12232;

display("Enumerating window properties");

for (var j in window) { 

  if (j==='xxx') {

    display("Found the global");

  }

}

display("Done enumerating window properties");

display("Does the global exist? " + ("xxx" in window));

display("The global's value is " + xxx);

display("Also available via <code>window.xxx</code>: " +

        window.xxx);

​

function display(msg) {

  var p = document.createElement('p');

  p.innerHTML = String(msg);

  document.body.appendChild(p);

}