Prevent pages from being iframed (compatible with IE, Firefox)_javascript skills

Previously, this code was used to prevent pages from being used by iframes

Copy code The code is as follows:

< ;script type="text/javascript>
if (top.location !== self.location) {
top.location=self.location;
}

But in Firefox you will find that the page will keep refreshing. The page is not usable at all.
This is because if there is no windows.top in firefox, it will be empty. In IE, windows. Top means that the page in this window is constantly refreshed and this js code is constantly running. This creates an infinite loop, which is why the page keeps refreshing.

So I changed the method and used the following code to be compatible with firefox

Copy code The code is as follows:

This problem is solved.
There is also php to implement

Copy the code The code is as follows:

$url = $_server['http_host'];
if( $url != 'www.jb51.net' )
{
exit();
}
　? >

asp implementation code

Copy code Code As follows:

yuming=Request.ServerVariables("SERVER_NAME")
if yuming<>"www.jb51.net" then
response.redirect "http://www. jb51.net"
end if

The principles of other languages ​​are similar, and you can obtain the environment variables.


I hope this can help everyone.