JSON, JQUERY et AJAX

$.ajax({
dataType: "json",
url: url,
data: data,
success: success
});

$.getJSON('test.json', function(data) {
var items = [];
$.each(data, function(key, val) {
items.push('<li id="' + key + '">' + val + '</li>');
});
$('<ul/>', {
'class': 'my-new-list',
html: items.join('')
}).appendTo('div#ajaxjson');
});