<!DOCTYPE HTML> <html> <!-- https://bugzilla.mozilla.org/show_bug.cgi?id=333983 --> <head> <title>Test for Bug 333983</title> <script type="text/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=333983">Mozilla Bug 333983</a> <p id="display"></p> <div id="content" style="display: none"> </div> <pre id="test"> <script class="testbody" type="text/javascript"> /** Test for Bug 333983 **/ HTMLElement.prototype.foopy = function () { return "foopy"; } var foopy = ""; try { foopy = document.body.foopy() } catch (ex) { foopy = ex + ""; } is(foopy, "foopy", "HTMLElement.prototype functions work"); </script> </pre> </body> </html>