Using Slider vertically

Using Slider vertically


I followed this tut:
http://net.tutsplus.com/tutorials/javascript-ajax/making-a-content-slider-with-jquery-ui/
but I cant make the slider function vertically. Well thats not true.
it actually does work but backwards. the handle starts on the bottom
of the slider and pulling it up causes the content to move in the same
direction. Im trying ot create a custom made scroll bar so I need it
to start at the bottom and as I pull it down, the content needs to
move up.
This is what I have
$(function() {
        //vars
        var conveyor = $(".content-conveyor", $("#sliderContent")),
        item = $(".item", $("#sliderContent"));
        //set length of conveyor
        conveyor.css("height", item.length * parseInt(item.css("height")));
//config
var sliderOpts = {
         max: (item.length * parseInt(item.css("height"))) - parseInt($
(".viewer", $("#sliderContent")).css("height")),
slide: function(e, ui) {
conveyor.css("top", "-" + ui.value + "px");
},
         orientation: 'vertical'
};
//create slider
$("#slider").slider(sliderOpts);
});