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copied!<p>Having just done a bit of reading on this, it looks like onerror can also be attached to the window object. See:</p> <p><a href="http://www.javascriptkit.com/javatutors/error.shtml" rel="nofollow noreferrer">http://www.javascriptkit.com/javatutors/error.shtml</a></p> <p>According to that page, you can pass in msg, url and linenumber arguments:</p> <pre><code>window.onerror=function(msg, url, linenumber){ alert('Error message: '+msg+'\nURL: '+url+'\nLine Number: '+linenumber) return true } </code></pre> <p>Not sure on the browser support for this, but thanks for bringing it to my attention!</p> <p><strong>Update:</strong> didn't do anything in Safari 4 (apart from logging an error in firebug as per usual), but shows the alert in Firefox 3.6 Beta 5. Error test at <a href="http://www.javascriptkit.com/javatutors/errortest2.htm" rel="nofollow noreferrer">http://www.javascriptkit.com/javatutors/errortest2.htm</a></p> <p><strong>Update 2:</strong> done a test with the following:</p> <p>index.html:</p> <pre><code><html> <head> <script type="text/javascript"> window.onerror=function(msg, url, linenumber){ alert('Error message: '+msg+'\nURL: '+url+'\nLine Number: '+linenumber) return true } </script> <script type="text/javascript" src="js.js"></script> </head> <body> </body> </html> </code></pre> <p>js.js: (stupid name, i know!)</p> <pre><code>document.write('hi there' </code></pre> <p>Result in FF 3.6 Beta 5:</p> <p><img src="https://twitpic.com/show/full/x758d.png" alt="Result"></p>

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