.zuoxuanfu{
left:10px;
position: fixed;
top: 160px;
z-index: 99;
width: 180px;
_position: absolute;
_top: expression(eval(document.documentElement.scrollTop+260));
margin-top: 0;
margin-right: 100px;
margin-bottom: 0px;
margin-left: 0px;}

.zuoxuanfu1{
position: fixed;
top: 500px;
z-index: 99;
width: 180px;
_position: absolute;
_top: expression(eval(document.documentElement.scrollTop+500));
margin-top: 0;
margin-right: 100px;
margin-bottom: 0px;
margin-left: 0px;}
.youxuanfu{
	right: 10px;
position: fixed;
top: 160px;
z-index: 100;
width: 180px;
_position: absolute;
_top: expression(eval(document.documentElement.scrollTop+260));
margin-top: 0;
margin-right: 0px;
margin-bottom: 0px;
margin-left: 520px;}
.youxuanfu1{
	left: 50%;
position: fixed;
top: 500px;
z-index: 100;
width: 100px;
_position: absolute;
_top: expression(eval(document.documentElement.scrollTop+500));
margin-top: 0;
margin-right: 0px;
margin-bottom: 0px;
margin-left: 520px;}