JavaScript实现仿新浪微博大厅和未登录腾讯微博首页滚动效果，貌似这些天有不少朋友需要这功能，前几天已经发了几个了，不过那一个效果是用jquery实现的《jQuery向上循环滚动（仿新浪微博未登录首页滚动微博显示）》，今天发现这款是js制作的好，不敢独享，希望需要的朋友喜欢哦。

效果图展示如下：

html代码

<div class="wp">

<ul id="slider" class="slider">

<li><a class="fl" href="javascript:;"><img src="http://t1.qlogo.cn/mbloghead/b9127c4ca63961bace88/50" alt="" /></a>

<p>入山又恐别倾城 世间安得双全 不负如来不负卿</p>

</li>

<li><a class="fl" href="javascript:;"><img src="http://t1.qlogo.cn/mbloghead/b9127c4ca63961bace88/50" alt="" /></a>

<p>第一最好不相见，如此便可不相恋。</p>

</li>

<li><a class="fl" href="javascript:;"><img src="http://t1.qlogo.cn/mbloghead/b9127c4ca63961bace88/50" alt="" /></a>

<p>那一天 闭目在经殿香雾</p>

</li>

<li><a class="fl" href="javascript:;"><img src="http://t1.qlogo.cn/mbloghead/b9127c4ca63961bace88/50" alt="" /></a>

<p> 你见 或者不见我 我就在那里 </p>

</li>

</ul>

</div>

<script type="text/javascript">

new slider({id:'slider'})

</script>

css代码

ul, li {margin:0;padding:0;list-style:none}

a{ color:#fff;}

body {margin:0;height:100%;background: #333;}

.wp {position: relative;width:800px;height:400px;overflow:hidden;margin:20px auto;border:4px solid #121212;background:#fff;}

.slider {position: absolute;width: 760px;padding:0 20px;left:0;top: 0;}

.fl {float:left}

.slider img {display:block; padding: 2px; border: 1px solid #ccc}

.slider li {padding: 20px 0; border-bottom: 1px dashed #ccc;overflow:hidden;width:100%}

.slider p {font-size: 12px;margin:0;padding-left:68px;color:#333;line-height:20px;}

js代码

function H$(i) {return document.getElementById(i)}

function H$$(c, p) {return p.getElementsByTagName(c)}

var slider = function () {

function inits (o) {

this.id = o.id;

this.at = o.auto ? o.auto : 3;

this.o = 0;

this.pos();

alert(o);

}

inits.prototype = {

pos : function () {

clearInterval(this.__b);

this.o = 0;

var el = H$(this.id), li = H$$('li', el), l = li.length;

var _t = li[l-1].offsetHeight;

var cl = li[l-1].cloneNode(true);

cl.style.opacity = 0; cl.style.filter = 'alpha(opacity=0)';

el.insertBefore(cl, el.firstChild);

el.style.top = -_t + 'px';

this.anim();

},

anim : function () {

var _this = this;

this.__a = setInterval(function(){_this.animH()}, 20);

},

animH : function () {

var _t = parseInt(H$(this.id).style.top), _this = this;

if (_t >= -1) {

clearInterval(this.__a);

H$(this.id).style.top = 0;

var list = H$$('li',H$(this.id));

H$(this.id).removeChild(list[list.length-1]);

this.__c = setInterval(function(){_this.animO()}, 20);

//this.auto();

}else {

var __t = Math.abs(_t) – Math.ceil(Math.abs(_t)*.07);

H$(this.id).style.top = -__t + 'px';

}

},

animO : function () {

this.o += 2;

if (this.o == 100) {

clearInterval(this.__c);

H$$('li',H$(this.id))[0].style.opacity = 1;

H$$('li',H$(this.id))[0].style.filter = 'alpha(opacity=100)';

this.auto();

}else {

H$$('li',H$(this.id))[0].style.opacity = this.o/100;

H$$('li',H$(this.id))[0].style.filter = 'alpha(opacity='+this.o+')';

}

},

auto : function () {

var _this = this;

this.__b = setInterval(function(){_this.pos()}, this.at*1000);

}

}

return inits;

}();

以上内容就是小编给大家分享的JavaScript实现仿新浪微博大厅和腾讯微博首页滚动特效源码，希望大家喜欢。