<!DOCTYPE HTML> <html> <!-- https://bugzilla.mozilla.org/show_bug.cgi?id=1043690 --> <head> <meta charset="utf-8"> <title>Test for Bug 1043690</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=1043690">Mozilla Bug 1043690</a> <p id="display"></p> <div id="content" style="display: none"> <form> <input name="action"> </form> </div> <script type="application/javascript"> /** Test for Bug 1043690 **/ var f = document.querySelector("form"); var i = document.querySelector("input"); is(f.getAttribute("action"), null, "Should have no action attribute"); is(f.action, i, "form.action should be the input"); f.action = "http://example.org"; is(f.getAttribute("action"), "http://example.org", "Should have an action attribute now"); is(f.action, i, "form.action should still be the input"); i.remove(); is(f.action, "http://example.org/", "form.action should no longer be shadowed"); </script> <pre id="test"> </pre> </body> </html>