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<body>
<a id="link" href="joint-session-history-child2.html">Child1</a>.
<iframe id="grandchild"></iframe>
</body>
<script>
window.onload = function() {
var link = document.getElementById("link");
var grandchild = document.getElementById("grandchild");
var timer = window.setInterval(poll, 100);
function poll() {
if (grandchild.getAttribute("data-grandchild-loaded")) {
window.clearInterval(timer);
link.click();
}
}
grandchild.src="joint-session-history-grandchild1.html";
};
</script>