这些js提示是咋回事

这些js提示是怎么回事？

<br />Unsafe JavaScript attempt to access frame with URL http://www.xxx.com from frame with URL http://my.qzone.qq.com/app/888.html?via=appcenter.info. The frame requesting access set 'document.domain' to 'qq.com', but the frame being accessed did not. Both must set 'document.domain' to the same value to allow access.<br />

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------解决方案--------------------
webkit 浏览器 (Safari or Chrome) 固有的错误，参见：
http://stackoverflow.com/questions/7438020/unsafe-javascript-attempt-to-access-frame-with-url