Error(一)

跨域请求：浏览器提示：

225.htm:1 XMLHttpRequest cannot load http://address. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://address' is therefore not allowed access.

可能原因：

If I understood it right you are doing an XMLHttpRequest to a different domain than your page is on. So the browser is blocking it as it usually allows a request in the same origin for security reasons. You need to do something different when you want to do a cross-domain request. A tutorial about how to achieve that is Using CORS.

如果我的理解是正确的你做一个XMLHttpRequest到不同的领域比你的页面上。所以浏览器阻塞它，因为它通常允许出于安全原因在同一起源的请求。当需要跨域请求时，需要做一些不同的操作。一篇关于如何实现，利用CORS。