Unsafe JavaScript attempt to access frame with URL https://xxx with URL http://xxx.

Unsafe JavaScript attempt to access frame with URL https://xxx with URL http://xxx. The frame requesting access has a protocol of 'http', the frame being accessed has a protocol of 'https'. Protocols must match.

   在做某鐵道部網站的某個小工具時遇到這個問題。具體看下面：

   追究其原因是因為 http://www.12306.cn/mormhweb/kyfw/ 使用的HTTP協議，而frame內嵌的網頁使用的HTTPS協議，協議不匹配，所以訪問不了，下面再上張圖，你懂的：