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: 1622	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1622/3df45f52a2f3a304b5c3c14817a3c2c3cbfc6921/static.js/buggy/xul/content/static.js