How to create continuous scrolling content using Jquery .animate() function?

Question

Possible Duplicate:
Implementing circular scroller in jquery

I want to create vertical scroller, which will work exactly like marquee. But I want it to be continuous, like when we use marquee the whole content comes back only after it completely goes up, but I want it to be continuous.

this is what I have... http://jsfiddle.net/JWfaf/1/

I want only in one direction and keep on scrolling. I hope I have cleared what I want to achieve

HTML

<div class="con">
   <ul>
      <li></li>
      <li></li>
      <li></li>
       <li></li>
   </ul>
</div>​

JavaScript

function animatethis(targetElement, speed) {
$(targetElement).animate({ marginTop: "+=250px"},
{
    duration: speed,
    complete: function ()
    {
        targetElement.animate({ marginTop: "-=250px" },
        {
            duration: speed,
            complete: function ()
            {
                animatethis(targetElement, speed);
            }
        });
    }
});
};

animatethis($('.con ul li:first-child'), 10000);​

Answer 1

Working Demo : http://jsfiddle.net/rNXs9/1/

HTML :

<div id="verticalScroller">
    <div>1 Lorem ipsum dolor sit</div>
    <div>2 Lorem ipsum dolor sit</div>
    <div>3 Lorem ipsum dolor sit</div>
    <div>4 Lorem ipsum dolor sit</div>
</div>
​

CSS:

#verticalScroller {
    position: absolute;
    width:52px;
    height: 180px;
    overflow: hidden;
}

#verticalScroller > div {
    position:absolute;
    width:50px;
    height:50px;
}
​

JS :

window.verticalScroller = function($elem) {
    var top = parseInt($elem.css("top"));
    var temp = -1 * $('#verticalScroller > div').height();
    if(top < temp) {
        top = $('#verticalScroller').height()
        $elem.css("top", top);
    }
    $elem.animate({ top: (parseInt(top)-60) }, 600, function () {
      window.verticalScroller($(this))
    });
}


$(document).ready(function() {
    var i = 0;
    $("#verticalScroller > div").each(function () {
          $(this).css("top", i);
          i += 60;
          window.verticalScroller($(this));
    });
});

​