浏览器查看出错！！
"XMLHttpRequest cannot load file:///D:/XAMPP/htdocs/ajax/serverjson.php?number=0. Cross origin requests are only supported for HTTP. XMLHttpRequestJson.html:42 Uncaught NetworkError: A network error occurred. "这是什么错误，每次在浏览器运行的时候都出现这个错误，老师能帮忙看看吗
