要设置最高位置，请使用JavaScript中的top 属性。您可以尝试运行以下代码以使用JavaScript设置div的顶部位置-
<!DOCTYPE html>
<html>
<head>
<style>
#myID {
position: absolute;
}
</style>
</head>
<body>
<button onclick="display()">Set Top Position</button>
<div id = "myID">
This is demo text! This is demo text!
</div>
<script>
function display() {
document.getElementById("myID").style.top = "100px";
}
</script>
</body>
</html>