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+<!DOCTYPE html>
+<html class="reftest-wait">
+<head>
+<body style="white-space:pre">0123456789
+<script>
+document.body.offsetTop;
+// Test focus < anchor = newfocus
+var t = document.body.firstChild;
+var sel = window.getSelection();
+sel.collapse(t, 8); // anchor
+sel.extend(t, 2); // focus
+
+function doTest() {
+ sel.extend(t, 8); // newfocus
+ document.documentElement.removeAttribute('class');
+}
+document.addEventListener("MozReftestInvalidate", doTest);
+</script>
+</body>
+</html>