无法跨域的原因?
XMLHttpRequest cannot load http://www.corsproxy.com/www.webxml.com.cn/WebServices/TrainTimeWebService.…&StartStation=%E6%94%BE%E6%9D%BE&ArriveStation=%E5%A4%A7%E5%B8%88%E6%B3%95. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://127.0.0.1:81' is therefore not allowed access.. 还是无法跨域,求老师指点为什么