<script type="text/javascript">  
   $(function() {  
   var offset = $("#fixed").offset();  
   var topPadding = 300;  
   $(window).scroll(function() {  
   if ($(window).scrollTop() > offset.top) {  
   $("#fixed").stop().animate({marginTop: $(window).scrollTop() - offset.top + topPadding});  
   }  
   else {$("#fixed").stop().animate({marginTop: 0});};});  
   });  
  </script>

#fixed{
    position: absolute;
}

<div id="fixed">$BASKET$</div>