<!DOCTYPE html>
<html lang="en">
<head>
<!--点击调到底部评论-->
<script>
function goBottom() {
window.scrollTo(0, document.documentElement.scrollHeight-document.documentElement.clientHeight);
}
</script>
<!--右边评论按钮-->
<style type="text/css">
button {
width: 50px;
position: fixed;
right: 0;
top: 500px;
display: none;
}
</style>
</head>
<body>
{LB_3g首页推荐}
<button id="top">
<span class="bottom-bar-item"><a href="javascript:void(0)" ><font size="3" color="#4F4F4F">评论</font></a></span> </button>
<!--上拉显示评论按钮js-->
<script>
var scrollTop = document.documentElement.scrollTop || document.body.scrollTop;
var top = document.getElementById("top");
window.onscroll = function () {
var top = document.getElementById("top");
if (document.documentElement.scrollTop > 500 || document.body.scrollTop > 500) {
top.style.display="block";
｝ else ｛
top.style.display="none";
｝
｝
</script>
</body>
</html>
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