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+<?xml version="1.0"?>
+
+<window id="Test for bug 540247" title="Testcase" class="reftest-wait"
+ xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+
+<script><![CDATA[
+document.addEventListener("MozReftestInvalidate", runtest, false);
+
+function runtest() {
+ // Make sure that the effects of the scroll are painted to the screen before
+ // shrinking the size of the scrolled frame.
+ window.addEventListener("MozAfterPaint", finish, false);
+ var sbo = document.getElementById('s').boxObject;
+ sbo.scrollTo(0, 1000);
+}
+
+function finish() {
+ document.getElementById('b').height = '100';
+ document.documentElement.className = "";
+}
+]]>
+</script>
+
+ <scrollbox id="s" height="200" style="overflow: scroll;">
+ <vbox>
+ <vbox height="150" width="200" style="background: red;" id="b"/>
+ <vbox height="150" width="200" style="background: green;"/>
+ <vbox height="150" width="200" style="background: blue;"/>
+ <label value="a"/>
+ </vbox>
+ </scrollbox>
+
+</window>