rem: function GoPreviousMessage(previousFunction, startFromEnd) 
add: function GoPreviousMessage(type, startFromEnd) 
context: function GoPreviousMessage(previousFunction, startFromEnd){	var tree = GetThreadTree();		var selArray = tree.selectedItems;	if ( selArray && (selArray.length == 1) )	{		var currentMessage = selArray[0];		var previousMessage = GetPreviousMessage(currentMessage, previousFunction, startFromEnd);		//Only change selection if there's a valid previous message.		if(previousMessage && (previousMessage != currentMessage))			ChangeSelection(tree, previousMessage);	}}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/4170fc4b9236a536c31f600a2e1c72350686521c/msgViewNavigation.js/buggy/mailnews/base/resources/content/msgViewNavigation.js