This script is very important for you, if you have problems protecting your own pages and their content. People will just link your page in a frameset and make it seem that it is their own work. To break out of their frameset we use the following script.
Break Out of Frames:
if (top.location != self.location), the script checks if the location of the current (self) page is the top most in the browsers window hierarchy. If so, there’s no need to change anything.
But if it does not match, your script will assign self.location to top.location (top.location = self.location) and make the current window reload and display your page and your page only! You can see a nice working example, if you try to load CNN’s site in a frame. You will see that the page reloads and displays CNN only.