<!DOCTYPE HTML> <html> <!-- https://bugzilla.mozilla.org/show_bug.cgi?id=812744 --> <head> <meta charset="utf-8"> <title>Test for Bug 812744</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=812744">Mozilla Bug 812744</a> <p id="display"></p> <div id="content" style="display: none"> <iframe id="f"></iframe> </div> <pre id="test"> <script type="application/javascript"> /** Test for Bug 812744 **/ SimpleTest.waitForExplicitFinish(); addLoadEvent(function() { var f = $("f"); var el = f.contentDocument.documentElement; f.onload = function() { el.setAttribute("onmouseleave", "(void 0)"); is(el.onmouseleave.toString(), "function onmouseleave(event) {\n(void 0)\n}", "Should have a function here"); SimpleTest.finish(); }; f.src = "http://www.example.com/" }); </script> </pre> </body> </html>