i am getting Ajax response as JSON which retrieves data from database, what I'm trying to achieve is to use the JSON data to populate the crystal report file which I have already created with pictures and all. Can I achieve this by just using HTML and JavaScript?
Only if you take care of converting the JSON to a file format (e.g. CSV) or data source (Excel, ODBC, ...) that Crystal can use. JSON is not a valid data source for Crystal Reports.