刚刚需要为网页添加一个返回顶部的效果,又懒得自己写,百度了一下找到两个还不错的。这里分享给大家。
<!DOCTYPE html>
<html lang="en">
<head>
<meta name="toTop" content="true">
<meta charset="UTF-8">
<title>返回顶部</title>
<style>
html{
height:3000px;
}
</style>
<script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
<script type="text/javascript">
jQuery(document).ready(function($) {
if($("meta[name=toTop]").attr("content")=="true"){
$("<div id='toTop'><img src='img/1.png'></div>").appendTo('body');
$("#toTop").css({
width: '50px',
height: '50px',
bottom:'10px',
right:'15px',
position:'fixed',
cursor:'pointer',
zIndex:'999999',
});
if($(this).scrollTop()==0){
$("#toTop").hide();
}
$(window).scroll(function(event) {
/* Act on the event */
if($(this).scrollTop()==0){
$("#toTop").hide();
}
if($(this).scrollTop()!=0){
$("#toTop").show();
}
});
$("#toTop").click(function(event) {
/* Act on the event */
$("html,body").animate({
scrollTop:"0px"},
666
)
});
}
});
</script>
</head>
<body>
<div>向下滚动查看效果</div>
</body>
</html>
<!DOCTYPE html>
<html lang="en">
<head>
<meta name="toTop" content="true">
<meta charset="UTF-8">
<title>返回顶部</title>
<style>
html{
height:3000px;
}
#to_top{width:25px;padding:5px; height:82px; font:14px/20px arial; text-align:center; background:#06c; position:absolute; cursor:pointer; color:#fff;}
</style>
<script src="http://libs.baidu.com/jquery/2.0.0/jquery.min.js"></script>
<script type="text/javascript">
$(function(){
var oTop = document.getElementById("to_top");
var screenw = document.documentElement.clientWidth || document.body.clientWidth;
var screenh = document.documentElement.clientHeight || document.body.clientHeight;
oTop.style.left = screenw - oTop.offsetWidth-50 + "px";
oTop.style.top = screenh - oTop.offsetHeight + "px";
window.onscroll = function () {
var scrolltop = document.documentElement.scrollTop || document.body.scrollTop;
oTop.style.top = screenh - oTop.offsetHeight + scrolltop-60 + "px";
}
oTop.onclick = function () {
document.documentElement.scrollTop = document.body.scrollTop = 0;
}
});
</script>
</head>
<body>
<div id="to_top">返回顶部</div>
</body>
</html>
预览地址:http://www.bright2017.top/test1/test1-06/
预览地址:http://www.bright2017.top/test1/test1-07/