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<!DOCTYPE html>
<body>
<script>
if (opener) {
// We're the popup. Send back our state. What we really want to send is
// our origin, but that will come automatically.
opener.postMessage(undefined, "*");
self.close();
} else {
// We're the child. Start listening for messages from our parent and open
// ourselves as the popup when we get the "start" message.
onmessage = function (e) {
if (e.data == "start") {
// Now listen for messages from the thing we plan to open.
onmessage = function(e) {
parent.postMessage({ data: e.data, origin: e.origin }, "*");
}
var a = document.createElement("a");
a.href = location.href;
a.target = "_blank";
a.rel = "opener";
document.body.appendChild(a);
a.click();
}
};
}
</script>