html====
\<body style="height:1000px">
\<div id="box">\</div>
css======
*{margin: 0;padding: 0;}
#box{width: 100px;height: 100px;background: red;position: absolute;right: 0;bottom: 0;}
js========
window.onscroll=function () {
var box=document.getElementById('box');
var scrollTop=document.documentElement.scrollTop||document.body.scrollTop;
box.style.top=document.documentElement.clientHeight-box.offsetHeight+scrollTop+"px";
}
你也将代码贴全啊,就这个样子谁也猜不出来的
你样式和脚本放到了style和script没有,要下面这样,没问题,一直在右下角浮动
<body style="height:1000px">
<div id="box"></div>
</body>
<style>
*{margin: 0;padding: 0;}
#box{width: 100px;height: 100px;background: red;position: absolute;right: 0;bottom: 0;}
</style >
<script>
window.onscroll = function () {
var box=document.getElementById('box');
var scrollTop=document.documentElement.scrollTop||document.body.scrollTop;
box .style.top=document.documentElement.clientHeight-box.offsetHeight+scrollTop+"px";
}
</script>
教你一个办法查看错误,用chrome 浏览器,打开这个页面,按 F12,在console一栏里会看到错误