rem: GoPreviousMessage(GoMessage, false); 
add: GoPreviousMessage(navigateAny, false); 
context: function MsgPreviousMessage(){	GoPreviousMessage(GoMessage, false);}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/4170fc4b9236a536c31f600a2e1c72350686521c/widgetglue.js/clean/mailnews/base/resources/content/widgetglue.js