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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>
<script type="text/javascript">
window.onload=function(){
document.all.test.onmouseenter=function(){
document.onmousewheel = function(){document.all.test.style.cssText='visibility:visible';}
}
document.all.test.onmouseleave =function(){
document.onmousewheel = null;
}
}
</script>
<body>
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<div style='position:fixed!important;position:absolute;right:0;top:100px;'>
<div id='test'>zzzzz</div id='test'>
</div>
aaaaaaaa<br>
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aaaaaaaa<br>
aaaaaaaa<br>
aaaaaaaa<br>
aaaaaaaa<br>
aaaaaaaa<br>
aaaaaaaa<br>
aaaaaaaa<br>
aaaaaaaa<br>
aaaaaaaa<br>
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aaaaaaaa<br>
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aaaaaaaa<br>
aaaaaaaa<br>
</body>
</html>