<!doctype html> | |
<html> | |
<head><title>Document</title></head> | |
<body> | |
<h1>Document</h1> | |
<script> | |
onload = function() { | |
document.addEventListener("visibilitychange", onVisibilityChange, false); | |
opener.postMessage("close", "*"); | |
} | |
function onVisibilityChange() { | |
opener.postMessage(document.visibilityState, "*"); | |
} | |
</script> | |
</body> | |
</html> |