| <html> |
| <script> |
| |
| var imageLoadResult = 'N/A'; |
| var iframeLoadResult = 'N/A'; |
| |
| function imageLoaded() { |
| var image = document.getElementById('blacklisted_image'); |
| // Additional sanity check to make sure the image is indeed loaded. |
| // Not strictly needed. |
| if (image.height == 1 && image.width == 1) { |
| imageLoadResult = "success"; |
| } else { |
| imageLoadResult = "error"; |
| } |
| } |
| |
| function imageError() { |
| imageLoadResult = "error"; |
| } |
| |
| function iframeLoaded() { |
| // Unfortunately, iframe load errors generally don't result in onerror |
| // actually being called, so also check that the title is accessible. |
| // Since this is a same-site iframe, it generally should be, unless there's |
| // an error page showing in the iframe, in which case it's treated as a |
| // cross-domain iframe. |
| try { |
| document.getElementById('blacklisted_iframe').contentDocument.title; |
| iframeLoadResult = "success"; |
| } catch (err) { |
| iframeLoadResult = "error"; |
| } |
| } |
| |
| function iframeError() { |
| iframeLoadResult = "error"; |
| } |
| |
| </script> |
| <img id="blacklisted_image" src="pixel.png" onload="imageLoaded()" onerror="imageError()"></img> |
| <iframe id="blacklisted_iframe" src="blank.html" onload="iframeLoaded()" onerror="iframeError()"></iframe> |
| </html> |
