$(document).ready(function(){
  var obj=$("#scroll");
  var startTop=0;
  var position_y=$(document.body).width()-98-50;
  obj.css({top:startTop,left:position_y});
  obj.animate({opacity:1},{duration:500,queue:false});  
  var position_x=100+$(window).scrollTop();
  var speed=500;
  MoveTo(obj,position_x,position_y,speed);
  $(window).scroll(function(){
			position_x=100+$(window).scrollTop();
			position_y=$(document.body).width()-98-50;
			MoveTo(obj,position_x,position_y,speed);
			//alert($(window).scrollTop());
			})
  })
function MoveTo(obj,position_x,position_y,speed)
{
	obj.animate({top:position_x,left:position_y},{duration:speed,queue:false});
	}