#roll_top, #fall, #ct
{
	position: relative;
	cursor: pointer;
	height: 72px;
	width: 26px;
}
#roll_top
{
	background: url("../img/top.gif")/*tpa=http://demo4314.adashuo.com/skin/img/top.gif*/ no-repeat;
}
#fall
{
	background: url("../img/top.gif")/*tpa=http://demo4314.adashuo.com/skin/img/top.gif*/ no-repeat 0 -80px;
}
#ct
{
	background: url("../img/top.gif")/*tpa=http://demo4314.adashuo.com/skin/img/top.gif*/ no-repeat 0 -40px;
}
#roll
{
	display: block;
	width: 15px;
	margin-right: -515px;
	position: fixed;
	right: 50%;
	top: 50%;
	_margin-right: -525px;
	_position: absolute;
	_margin-top: 300px;
	_top: expression(eval(document.documentElement.scrollTop));
}