Untitled

 <!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Title of the document</title>
<script>
function core() {
  var foo = "foo,  bar, baz";
  Event.trigger('foo.post', foo);
}
function plugin(params) {
  console.log("Plugin can do something with: " + params);
}
Event.connect('foo.post', plugin);
core();
</script>
</head>

<body>
defefefe
</body>

</html>