return null; 
return r.content; 
function sendJSONRequest (url, data, callback, user, password, headers) {			if (typeof headers !== "object") {headers = {};}	headers['Accept'] = 'text/javascript';	headers['Accept-Charset'] = 'UTF-8';	var r = sendAndLoad(url, toJSONString(data), callback, user, password, headers);	if ((r.status===200 && (/^text\/javascript;?.*/i).test(r.type)) || r.status===0)	{		return parseJSONString(r.content);	}	else	{		return null;	}}
6251	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/6251/e09063e27b11b32febc2958b85f712542cfdaa6c/main.js/clean/Modules/Scorm2004/scripts/main.js