$.get(“/intra/do/sequence_has_codonList.pl”,function(data){

        data = JSON.parse(data); // array of objects

        for(var i = 0, n = data.length; i<n; i++) {

            for(var j = 0, codons = data[i].codons, m = codons.length; j<m; j++) {

                if (codons[j] !== 0 ) {

                    var aa = codons[j].toUpperCase(), bb = data[i].abbr.toUpperCase(), cc = data[i].full;

                    codonIMap[aa] = bb;

                    codonFMap[aa] = cc;

                   // cannot be indexed, I don't know why.

                }

            }

        }

    });