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转自 http://www.veryhuo.com/a/view/27157.html
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<head>
<title>兼容IE6的淘宝悬浮工具栏</title>
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<style type="text/css">
body,html{margin:0;padding:0;font-size:12px;font-family:Arial;font:12px/1 Helvetica, Tahoma, Arial, \5b8b\4f53, sans-serif;background:url() fixed}
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<body>
<div style="height:300px;background:#eee"></div>
<div id="box"><div id="float" ></div></div>
<div style="height:1000px;background:#eee"></div>
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<script type="text/javascript">
var IO=document.getElementById('float'),Y=IO,H=0,IE6;
IE6=window.ActiveXObject&&!window.XMLHttpRequest;
while(Y){H+=Y.offsetTop;Y=Y.offsetParent};
if(IE6)
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".documentElement.scrollTop-(this.javascript||"+H+")):0)";
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try{document.execCommand("BackgroundImageCache",false,true)}catch(e){};
//]]>
</script>
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