<!DOCTYPE HTML> <html> <!-- https://bugzilla.mozilla.org/show_bug.cgi?id=585745 --> <head> <title>Test for Bug 585745</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=585745">Mozilla Bug 585745</a> <p id="display"></p> <div id="content" style="display: none"> </div> <pre id="test"> <script type="application/javascript"> /** Test for Bug 585745 **/ var a = document.createElementNS("http://www.w3.org/1998/Math/MathML", 'mrow'); var b = document.createElementNS("http://www.w3.org/1999/xhtml", 'span'); var htmlProto = Object.getPrototypeOf(b); var mathMLProto = Object.getPrototypeOf(a); // XXXbz once bug 560072 is fixed, we should be able to use // getOwnPropertyDescriptor here. Object.defineProperty(mathMLProto, "style", { get: htmlProto.__lookupGetter__("style"), }); var threw = false; try { a.style; } catch(e) { threw = true; } is(threw, true, "Getting .style off a mathml element should throw in this case"); </script> </pre> </body> </html>