return; 
function queryNavigation (type, target) {	if (state) 	{		return false; // already processing	}	state = QUERYING;	var res = exec({type:type, target:target});	state = WAITING;	return !res.exception;}
6251	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/6251/ebdb8ea432053e3eed7a5ec32e46f06704042fc4/main.js/clean/Modules/Scorm2004/scripts/main.js