<!DOCTYPE html> <html> <head> <meta charset="utf-8"/> <script> var txt=""; function message(aa) { try { txt = JSON.parse(aa) } catch(err) { txt="本页有一个错误。\n\n"; txt+="错误描述：" + err.message + "\n\n"; txt+="点击确定继续。\n\n"; alert(txt); } return txt; } </script> </head> <body> <input type="button" value="查看消息" onclick="message()" /> </body> </html>
原文：http://www.cnblogs.com/suoking/p/5312294.html