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<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Document</title> </head> <script type="text/javascript"> onerror = function(msg,url,l) { var txt=""; txt+= msg + "\n"; txt+= "URL: " + url + "\n"; txt+= "Line: " + l + "\n\n"; alert(txt); } </script> </head> <body> <input type="button" value="View message" onclick="test()" /> </body> </html>
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原文地址：http://www.cnblogs.com/CyLee/p/5814016.html
