HTML页面通过Ajax调用公网web服务时,浏览器请求发送成功,但是响应的 xhr.status==0,控制台报错如下 XMLHttpRequest cannot load http://ws.webxml.com.cn/WebServices/MobileCodeWS.asmx. Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is…