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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>定位</title>
<link href="style.css" type="text/css" rel="stylesheet">
</head>
<body>
<div id="position1"></div>
<script>
for (var i = 0; i<100; i++) {
document.write(i+"<br/>")
}
</script>
</body>
</html>
输入 JavaScript 代码……
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#position1{
width: 100px;
height: 100px;
background-color: aqua;
position: fixed;
