michael@0: /**
michael@0:  * Any copyright is dedicated to the Public Domain.
michael@0:  * http://creativecommons.org/publicdomain/zero/1.0/
michael@0:  */
michael@0: onclose = function() {
michael@0:   postMessage("Closed!");
michael@0: }
michael@0: 
michael@0: onmessage = function(event) {
michael@0:   throw "No messages should reach me!";
michael@0: }
michael@0: 
michael@0: setInterval(function() { postMessage("Still alive!"); }, 100);