var yuipath = 'clientscript/yui';
var yuicombopath = '';
var remoteyui = false;
else // Load Rest of YUI remotely (where possible)
var yuipath = 'http://yui.yahooapis.com/2.9.0/build';
var yuicombopath = 'http://yui.yahooapis.com/combo';
var remoteyui = true;
If you look down to the right, there's a "Go" button down there to take you back to the forum you're already in. Further down than that, you can see a link "Top", which bumps the screen back to the top of the page.
Also, if you hit the Home key when you're not typing a message, it will also send you back to the top of the page.