上拉右侧显示按钮-玄门社区-风水自学网

<!DOCTYPE html>

<head>

function goBottom() {

window.scrollTo(0, document.documentElement.scrollHeight-document.documentElement.clientHeight);

}

</script>

button {

width: 50px;

position: fixed;

right: 0;

top: 500px;

display: none;

}

</style>

</head>

<body>

{LB_3g首页推荐}

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>

<button id="top"> 返回顶部</button>

返回顶部换js

var scrollTop = document.documentElement.scrollTop || document.body.scrollTop;

var top = document.getElementById("top");

top.onclick = function () {

      var time = setInterval(function () {

         document.documentElement.scrollTop--;

         document.body.scrollTop--;

         if (document.documentElement.scrollTop <= 0 && document.body.scrollTop <= 0) {

            clearInterval(time);

         }

      },1)

}

window.onscroll = function () {

      var top = document.getElementById("top");

      if (document.documentElement.scrollTop > 200 || document.body.scrollTop > 200) {

         top.style.display="block";

      } else {

         top.style.display="none";

      }

}