File under: Unintended Consequences. Also, Postel's law could probably be tricked into admitting itself as an accomplice.

1. Browser based Javascript provides a location object for managing and accessing the current browser location, and this location object is available as a global variable.

2. Browser based Javascript also provides a special case in the interpreter/processer/etc., where setting the location object equal to itself will reload the current page. This is also true for certain properties of the location object (href)

3a. There is also a more conventional reload method on the location object which accepts either a location object or string href. Also, many of the "go to this URL methods" exposed to Javascript will interpret "go to the url I'm at" as a request to reload the page. Many of these methods will accepts a location object, or a string representation of a URL as a paramater.

3b. location.href is a string representation of a URL

3. There are many ways to access global variables in Javascript. There are many ways to assign a value in javascript. There are many ways to call a method in javascript.

4. All of the above can be combined into lots (likely more than the 535) of ways to achieve the same thing.