What does the javascript snippet mean?
javascript
Solution
This will break out of a HTML frame and replace the top-level frame by the current page.
It's akin to clicking a link with `target="_top"` set which will throw away the complete frameset and replace it with the page that link points to. It's exactly what that code does by simply "opening a link" (in user terms; in JavaScript it takes the form of `window.open`) to the very same page we're seeing, but at the top level.
`self` in this respect is the page we're currently in. `top` is the top-level frame the browser is displaying. If the browser doesn't display a frameset, then `self == top` holds. If however, our page is framed, then they will be different.
So `self != top` detects if the page is displayed in a frame and `window.open` is, as noted before, just like clicking on a link with the `target` attribute set to `"_top"` (the second argument.
Problem
``` if(self!=top){ window.open(self.location,'_top'); } ``` Can someone explain this? EDIT What does `self!=top` and `window.open(self.location,'_top')` mean respectively?