RUNOOB.COM
源代码：
点击运行
<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>电脑学习网教程(runoob.com)</title> <script> var txt=""; function message(){ try{ adddlert("Welcome guest!"); } catch(err){ txt="本页有一个错误。\n\n"; txt+="单击确定继续跳转\n"; txt+="或者单击取消返回\n\n"; if(confirm(txt)){ document.location.href="//www.runoob.com/"; } } } </script> </head> <body> <input type="button" value="查看消息" onclick="message()" /> </body> </html>
运行结果