rem: if (!frame || !("contentWindow" in frame)) return;  var w = frame.contentWindow;  if (force || checkScroll(frame)) w.scrollTo(0, w.document.height); 
add: var window = getContentWindow(frame); if (window && (force || checkScroll(frame))) window.scrollTo(0, window.document.height); 
context: function scrollDown(frame, force){    if (!frame || !("contentWindow" in frame))        return;    var w = frame.contentWindow;    if (force || checkScroll(frame))        w.scrollTo(0, w.document.height);}
meta: 3298	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/3298/377dd328ba12f71ca976ba1a877bf8881dae0beb/static.js/buggy/xul/content/static.js