Ajax to send image by unregistered user

Hi, im trying to setup a guest form to upload some data and the image.
ive got proble with implementing pushing the image through ajax to php.

the form can bo found here
http://hellostudio.eu/clients/zagrodowy/dodaj-przepis/

and the code so far

var post = {
            author : $js('#imie').val(),
            email : $js('#email').val(),
            title : $js('#title').val(),
            category : $js('#category').val(),
            timeCat : $js('#time').val(),
            image : $js('#thumbnail').val(),
            content : $js('#rec_content').val(),
            tags : allTags
        };

        $js.ajax({
                    url : "/clients/zagrodowy/wp-admin/admin-ajax.php",
                    type : 'POST',
                    data : 'action=receipe_submit'+
                    '&author='+post.author+
                    '&email='+post.email+
                    '&title='+post.title+
                    '&category='+post.category+
                    '&time='+post.timeCat+
                    '&image='+post.image+
                    '&content='+post.content+
                    '&tags='+post.tags,

                    success : function(results) {
                        //alert(results);
                        $js("#add-receipe").slideUp('slow');
                        $js("#response").html('<h2 class="thanks">Dziękujemy za dodanie przepisu!</h2>');
                        Cufon.refresh();
                        //$js('#submit-ajax').removeAttr("disabled");
                        //$js('#submit-ajax').click();
                        // Engine.tabs();
                        // Engine.hovers();
                        // Engine.clicks();
                        // Engine.slider();
                    }
                });
    })

maybe someone knows some way around that 🙂