return false; 
return true; 
function onMessageViewMouseDown(e){    if ((typeof startScrolling != "function") ||        ((e.which != 1) && (e.which != 2)))    {        return false;    }            var cx = getMessagesContext(null, e.target);    var command = getEventCommand(e);    if (!client.commandManager.isCommandSatisfied(cx, command))        startScrolling(e);    return false;}
5459	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/5459/de54848011e2959756f4e50529003007577851c0/handlers.js/buggy/extensions/irc/xul/content/handlers.js