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+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=646757
+-->
+<head>
+ <title>Test for Bug 646757</title>
+ <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+ <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
+</head>
+<body style="margin:0" id="body">
+<div style="height:20.3px; width:400px; background:pink" id="d1"></div>
+<div style="height:20px; width:400px; background:yellow" id="d2"></div>
+<div style="height:9.7px; width:400px;" id="space1"></div>
+<div style="height:20.7px; width:400px; background:pink" id="d3"></div>
+<div style="height:20px; width:400px; background:yellow" id="d4"></div>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=646757">Mozilla Bug 646757</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+<script class="testbody" type="text/javascript">
+function testPoint(x, y, id) {
+ is(document.elementFromPoint(x, y).id, id,
+ "checking element at " + x + "," + y);
+}
+
+/** Test for Bug 646757 **/
+testPoint(200, 20, "d1");
+testPoint(200, 20.2, "d1");
+testPoint(200, 20.4, "d2");
+testPoint(200, 21, "d2");
+
+testPoint(200, 70, "d3");
+testPoint(200, 70.6, "d3");
+testPoint(200, 70.8, "d4");
+testPoint(200, 71, "d4");
+</script>
+</pre>
+</body>
+</html>
+