how to drag and drop a div on a website on the iPhone using jquery .

Question

this is my code using jquery-ui , but it can't work on iphone :

$("#droppable").droppable({
                greedy: true,
                drop: function(event, ui) {
                    //$(this).find('p').html('Dropped!');
                    $(this).append($(ui.helper).draggable("disable").addClass('end').find('p'))
                    $(ui.helper ).remove()
                }
            });

so what can i do ?

thanks