$.ajax({
    type: ‘post‘,
    url: ‘your url‘,
    data: $("form").serialize(),
    success: function(data) {
        // your code
    }
});

 $(‘#fm‘).form(‘submit‘, {
        url: url,
        onSubmit: function () {
            return $(this).form(‘validate‘);
        },
        success: function (result) {
            result = eval(‘(‘ + result + ‘)‘);

        }
    });