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+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=470769
+-->
+<head>
+ <title>Test for Bug 470769</title>
+ <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+ <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=470769">Mozilla Bug 470769</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+<script type="application/javascript">
+
+/** Test for Bug 470769 **/
+
+var e = document.getElementById("display");
+e.setAttribute("style", "z-index: 2147483647"); // maximum signed 32-bit
+is(e.style.zIndex, "2147483647", "element.style should roundtrip correctly");
+is(window.getComputedStyle(e, "").zIndex, "2147483647",
+ "getComputedStyle should roundtrip correctly");
+
+</script>
+</pre>
+</body>
+</html>