请问放在代码必须是首页吗?

请问放在代码必须是首页吗?

用户系统信息:Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; GTB6.5; SV1;  Embedded Web Browser from: http://bsalsa.com/; Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Trident/4.0; Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) ; .NET CLR 2.0.50727; .NET CLR 3.0.04506.648; .NET CLR3.5.21022; MAXTHON 2.0) Embedded Web Browser from: http://bsalsa.com/; Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; QQDownload 590; Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1) ; .NET CLR 2.0.50727; MAXTHON 2.0) Embedded Web Browser from: http://bsalsa.com/; .NET CLR 2.0.50727; 360SE)
www.zm21.com