document.write('<p>&nbsp;解析：</p><div>HTTP 协议的状态消息有：</div><div>1xx：信息（100 Continue，101 Switching Protocols ）</div><div>2xx：成功（200 OK，201 Created，202 Accepted，203 Non-authoritative Information，</div><div>204 No Content，205 Reset Content，206 Partial Content ）</div><div>3xx ：重定向（300 Multiple Choices，301 Moved Permanently，302 Found，</div><div>303 See Other，304 Not ModifIEd，305 Use Proxy，306 Unused，307 Temporary</div><div>Redirect ）</div><div>4xx：客户端错误（400 Bad Request，401 Unauthorized，402 Payment Required，</div><div>403 Forbidden，404 Not Found，405 Method Not Allowed，406 Not Acceptable，</div><div>407 Proxy Authentication Required，408 Request Timeout，409 Conflict，410</div><div>Gone，411 Length Required，412 Precondition Failed，413 Request Entity Too</div><div>Large，414 Request-url Too Long，415 Unsupported Media Type，416 Request Range not satis fiable，417 Expectation Failed ）</div><div>5xx：服务器错误（500 Internal Server Error，501 Not Implemented，502 Bad</div><div>Gateway，503 Service Unavailable，504 Gateway Timeout，505 HTTP Version Not</div><div>Supported ）</div><div>200 OK：请求成功（其后是对 get 和 post 请求的应答文档）。</div><div>302 Found：所请求的页面已经临时转移至新的 URL。</div>');