<!DOCTYPE HTML> <html> <!-- https://bugzilla.mozilla.org/show_bug.cgi?id=377539 --> <head> <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" /> <title>Testcase for bug 377539</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=377539">Mozilla Bug 377539</a> <p id="display"></p> <div id="content" style="display: none"> </div> <script type="text/javascript"> var sw; var child_sw = -1; function test(){ var t = '<div style="display: none;"><iframe onload="doChecks()" src="data:text/html,<body><scr'+'ipt>try {parent.child_sw=screen.width}catch(e){}</scr'+'ipt>"></iframe></div>'; var div = document.createElement('div'); div.innerHTML = t; document.getElementsByTagName('body')[0].appendChild(div); } try { sw = screen.width; } catch (e) { sw = -1; } </script> <pre id="test"> <script class="testbody" type="text/javascript"> function doChecks() { isnot(sw, -1, "screen.width threw an exception"); is(child_sw, sw, "iframe got wrong screen.width"); SimpleTest.finish(); } SimpleTest.waitForExplicitFinish(); test(); </script> </pre> </body> </html>