$.ajax({

            type: 'HEAD', // 获取头信息，type=HEAD即可

            url : window.location.href,

            //url:"http://device.qq.com/cgi-bin/device_cgi/remote_bind_get_Verify",

            complete: function( xhr,data ){

                // 获取相关Http Response header

                var wpoInfo = {

                    // 服务器端时间

                    "date" : xhr.getResponseHeader('Date'),

                    // 如果开启了gzip，会返回这个东西

                    "contentEncoding" : xhr.getResponseHeader('Content-Encoding'),

                    // keep-alive ？ close？

                    "connection" : xhr.getResponseHeader('Connection'),

                    // 响应长度

                    "contentLength" : xhr.getResponseHeader('content-length'),

                    // 服务器类型，apache？lighttpd？

                    "server" : xhr.getResponseHeader('Server'),

                    "vary" : xhr.getResponseHeader('Vary'),

                    "transferEncoding" : xhr.getResponseHeader('Transfer-Encoding'),

                    // text/html ? text/xml?

                    "contentType" : xhr.getResponseHeader('Content-Type'),

                    "cacheControl" : xhr.getResponseHeader('Cache-Control'),

                    // 生命周期？

                    "exprires" : xhr.getResponseHeader('Exprires'),

                    "lastModified" : xhr.getResponseHeader('Last-Modified')

                };

                //console.log(xhr.getAllResponseHeaders());

                console.log(wpoInfo,0000);

            }

        });