I am trying to get a certain element from an iframe from another site. Yet I get security errors. Even when trying to get the element from an iframe that is local.
Uncaught SecurityError: Blocked a frame with origin "null" from accessing a frame with origin "null". Protocols, domains, and ports must match.
Basically I am trying to make a private high-scores system for my clan, for the game I play. I want to have it display the top 50 rank players within the clan.

I only know the very basics of JavaScript. I have been Google'ing for the last 2 hours or so and I cannot find a solution, I can understand.

Can someone please show me an example of how it's done or point me in the right direction, keeping in-mind my technical abilities (little-to-none).

Here is a link to the kind of page I need to rip content from.

Sorry if this post is any trouble...

Thank you,