<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title></title>
<script src="../js/jquery.js" type="text/javascript" charset="utf-8"></script>
<script type="text/javascript">
$(function(){
$('button').click(function(){
alert($(document).scrollTop());
})
})
</script>
<style type="text/css">
button{
position: fixed;
right: 0;
bottom: 0;
}
body{
height: 3000px;
}
</style>
</head>
<body>
<button type="button">提交</button>
</body>
</html>
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