源代码 ：
点击运行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>开源教程(ossoft.cn)</title> <script> onerror=handleErr; var txt=""; function handleErr(msg,url,l){ txt="该页面有一个错误\n\n"; txt+="错误: " + msg + "\n"; txt+="URL: " + url + "\n"; txt+="行: " + l + "\n\n"; txt+="点击确定继续。\n\n"; alert(txt); return true; } function message(){ adddlert("Welcome guest!"); } </script> </head> <body> <input type="button" value="查看消息" onclick="message()" /> </body> </html>
运行结果