您好,当用户到达页面底部时,我如何在Javascript (无 Jquery)中获得警报?我尝试基于另一个示例here类似这样但没有成功。
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Untitled Document</title>
</head>
<body>
<div id="bla" style="width:145px;">
long text here
</div>
<script type="text/javascript">
var obj = document.getElementById("bla");
debugger;
if( obj.scrollTop == (obj.scrollHeight - obj.offsetHeight))
{
alert("down");
};
</script>
</body>
</html>