源码网两侧漂浮。经测试，兼容IE6，IE7，Firefox浏览器。
CSS代码为：
.r1{width:80px;height:80px;background:red;float:right;
position:fixed !important; top/**/:200px;
position:absolute; z-index:300; top:expression(offsetParent.scrollTop+200);right:20px;}
.r2{width:80px;height:80px;background:red;float:right;
position:fixed !important; top/**/:300px;
position:absolute; z-index:400; top:expression(offsetParent.scrollTop+300);right:20px;}
.l1{width:80px;height:80px;background:red;float:right;
position:fixed !important; top/**/:200px;
position:absolute; z-index:300; top:expression(offsetParent.scrollTop+200);left:20px;}
.l2{width:80px;height:80px;background:red;float:right;
position:fixed !important; top/**/:300px;
position:absolute; z-index:400; top:expression(offsetParent.scrollTop+300);left:20px;}
页面代码为：
class="r1">
href="/d/adclick.php?id=11&url="
target='_about'>
height="80" border="0" />
href="/d/adclick.php?id=11&url="
target='_about'>
height="80" border="0" />
href="/d/adclick.php?id=11&url="
target='_about'>
height="80" border="0" />
href="/d/adclick.php?id=11&url="
target='_about'>
height="80" border="0" />
原创文章，转载必须注明出处！
出处：源码网，
