Object
0: "27"
1: "BORDAS"
2: "Marie"
3: "3"
4: "1978-01-13"
5: "comm"
6: "mus"
date_n: "1978-01-13"
loisirs: "mus"
nom: "BORDAS"
num: "27"
prenom: "Marie"
service: "comm"
titre: "3"

$.ajax( {
    url: 'edit.php',
type: 'post',
dataType: 'json',
data: { id: person }
}).done( function( results ) {
console.log( results );
console.log( results.prenom );
});

$.each( results, function( key, value ) {
    console.log( value.prenom );
});