add:  if( xmlhttpext) { xmlhttpext.abort(); } content.location = starturl; 
context: 	onStop: function(event)	{		running = false;	}, // onStop
meta: 10019	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10019/b8713d2c4675db7ebd878893225c9da424d812db/overlay.js/buggy/src/content/overlay.js