Jquery与JS两种方法仿twitter/新浪微博高度自适应无缝滚动实现代码

首先是Jquery

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
<html xmlns="http://www.w3.org/1999/xhtml"> 
<head> 
<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script> 
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> 
<title>无标题文档</title> 
<script language="javascript"> 
$(function(){ 
var scrtime; 
$("#con").hover(function(){ 
clearInterval(scrtime);

},function(){

scrtime = setInterval(function(){ 
var $ul = $("#con ul"); 
var liHeight = $ul.find("li:last").height(); 
$ul.animate({marginTop : liHeight+40 +"px"},1000,function(){

$ul.find("li:last").prependTo($ul) 
$ul.find("li:first").hide(); 
$ul.css({marginTop:0}); 
$ul.find("li:first").fadeIn(1000); 
}); 
},3000);

}).trigger("mouseleave");

}); 
</script> 
<style type="text/css"> 
 
</style> 
<body> 
<div id="con"> 
<ul> 
<li> 如需引入外部Js需刷新才能执行]</div> <BR>这个是JavaScript： <BR><div class="htmlarea"><TEXTAREA id="runcode54865"> 
<!doctype html> 
<html> 
<head> 
<title>tweets-slide</title> 
<meta http-equiv="Content-type" content="text/html; charset=utf-8" /> 
<style type="text/css"> 
ul, li {margin:0; padding:0;list-style:none} 
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;} 
</style> 
<script type="text/javascript"> 
function H$(i) {return document.getElementById(i)} 
function H$(c, p) {return p.getElementsByTagName(c)} 
var slider = function () { 
function init (o) { 
this.id = o.id; 
this.at = o.auto ? o.auto : 3; 
this.o = 0; 
this.pos(); 
} 
init.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 init; 
}(); 
</script> 
</head> 
<body> 
<div class="wp"> 
<ul id="slider" class="slider"> 
<li>如需引入外部Js需刷新才能执行]</div> <BR>两种代码比较，很显然，Jquery的代码简单明了，强力推荐！ </P>

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Jquery与JS两种方法仿twitter/新浪微博 高度自适应无缝滚动实现代码

Jquery与JS两种方法仿twitter/新浪微博高度自适应无缝滚动实现代码