if (top.location != self.location)
top.location = self.location;这段代码起什么作用
if (top.location != self.location)
top.location = self.location;这段代码起什么作用
if (top.location != self.location)
top.location = self.location;这段代码起什么作用
if (top.location != self.location)
top.location = self.location;这段代码起什么作用
那么top.location != self.location 就代表如果地址栏里的URL不跟请求数据的URL不一样的话说明站点被IFRAME了，那么就自动跳转到self.location，就是这个代码了： top.location = self.location;