javascript如何实现列表滚动？
本文实例讲述了javascript实现列表滚动的方法。分享给大家供大家参考。具体如下：
index.html如下：
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta name="keywords" content="" />
<meta name="description" content="" />
<link rel="stylesheet" type="text/css" href="css/global.css" />
<script type="text/javascript" src="js/jquery-1.7.min.js"></script>
<script type="text/javascript" src="js/scroll_img.js"></script>
<title>图片列表滚动</title>
</head>
<body>
<div class="scroll_img_wrap clearfix">
<p class="left_btn"><a href="javascript:void(0)"><img src="images/btn.jpg" /></a></p>
<div id="scroll_img">
<ul class="scroll_img_list clearfix">
<li>
<p><a href="#"><img src="images/1.jpg" alt="#" /></a></p>
<p><a href="#">information1</a></p>
</li>
<li>
<p><a href="#"><img src="images/1.jpg" alt="#" /></a></p>
<p><a href="#">information2</a></p>
</li>
<li>
<p><a href="#"><img src="images/1.jpg" alt="#" /></a></p>
<p><a href="#">information3</a></p>
</li>
<li>
<p><a href="#"><img src="images/1.jpg" alt="#" /></a></p>
<p><a href="#">information4</a></p>
</li>
<li>
<p><a href="#"><img src="images/2.jpg" alt="#" /></a></p>
<p><a href="#">information5</a></p>
</li>
<li>
<p><a href="#"><img src="images/2.jpg" alt="#" /></a></p>
<p><a href="#">information6</a></p>
</li>
<li>
<p><a href="#"><img src="images/2.jpg" alt="#" /></a></p>
<p><a href="#">information7</a></p>
</li>
<li>
<p><a href="#"><img src="images/2.jpg" alt="#" /></a></p>
<p><a href="#">information8</a></p>
</li>
<li>
<p><a href="#"><img src="images/1.jpg" alt="#" /></a></p>
<p><a href="#">information9</a></p>
</li>
<li>
<p><a href="#"><img src="images/1.jpg" alt="#" /></a></p>
<p><a href="#">information10</a></p>
</li>
<li>
<p><a href="#"><img src="images/1.jpg" alt="#" /></a></p>
<p><a href="#">information11</a></p>
</li>
<li>
<p><a href="#"><img src="images/1.jpg" alt="#" /></a></p>
<p><a href="#">information12</a></p>
</li>
<li>
<p><a href="#"><img src="images/1.jpg" alt="#" /></a></p>
<p><a href="#">information13</a></p>
</li>
<li>
<p><a href="#"><img src="images/1.jpg" alt="#" /></a></p>
<p><a href="#">information14</a></p>
</li>
</ul>
</div>
<p class="right_btn"><a href="javascript:void(0)"><img src="images/btn.jpg" /></a></p>
</div>
</body>
<script type="text/javascript">
(function(){
var test=new scroll_img('scroll_img',150,590,140,10);
test.initialize();
$('.left_btn').click(function(){
test.stop();
test.left();
test.autoplay();
});
$('.right_btn').click(function(){
test.stop();
test.right();
test.autoplay();
});
})();
</script>
</html>
scroll_img.js如下：
function scroll_img(target,distance,show_width,li_width,mr){
this.distance=distance; //每次移动距离
this.target=$("#"+target);
this.show_width=show_width; //显示区域宽度
this.li_width=li_width; //items宽度
this.mr=mr; //items间距
this.scrollbar=$("#"+target).find('ul');
this.position=0;
this.direction=1;
}
scroll_img.prototype={
version:1.00,
author:"yangfeifei",
date:2011-11-21,
initialize:function(){
var t=this;
t.scrollbar.css('position','relative');
//初始动作
t.autoplay();
t.scrollbar.mouseover(function(){t.stop();}); //鼠标移到图片上停止自动播放
t.scrollbar.mouseout(function(){t.autoplay();}); //鼠标移出图片开始自动播放
},
right:function(){
var t=this;
(-t.position)<t.total_length()?t.position-=t.distance:t.position=t.position;
if((-t.position)<t.total_length()){
t.scrollbar.animate({left:t.position},500);
t.direction=1;
}
if((-t.position)==t.total_length()){
t.scrollbar.animate({left:t.position},500);
t.direction=-1;
}
},
left:function(){
var t=this;
(-t.position)>0?t.position+=t.distance:t.position=t.position;
if((-t.position)>0){
t.scrollbar.animate({left:t.position},500);
t.direction=-1;
}
if((-t.position)==0){
t.scrollbar.animate({left:t.position},500);
t.direction=1;
}
},
total_length:function(){
var t=this,
total_num=t.scrollbar.find('li').length;
return total_num*(t.li_width+t.mr)-(t.mr+t.show_width);
},
autoplay:function(){
var t=this;
t.setInt=setInterval(function(){
t.direction==1?t.right():t.left();
},3000);
},
stop:function(){
var t=this;
clearInterval(t.setInt);
}
}
global.css如下：
/*CSS reset*/
body,div,dl,dt,dd,ul,ol,li,h1,h2,h3,h4,h5,h6,pre,form,fieldset,input,textarea,p,blockquote,th,td{margin:0;padding:0;font-family:arial,"宋体";}
table{border-collapse:collapse;border-spacing:0;}
fieldset,img{border:0;}
address,caption,cite,code,dfn,em,strong,th,var{font-style:normal;font-weight:bold;}
ol,ul{list-style-type:none;}
caption,th{text-align:left;}
h1,h2,h3,h4,h5,h6{font-size:100%;font-weight:normal;}/*font-size:100%;的作用主要是改变它默认的大小，继承父体的字体大小*/
q:before,q:after{content:' ';}
abbr,acronym{border:0;}
.cb{clear:both;}
.cl{clear:left;}
.cr{clear:right;}
.clearfix:after{content:".";display:block;height:0;clear:both;visibility:hidden;}
.clearfix{display:inline-block;}
* html .clearfix{height:1%;}
.clearfix{display:block;}
/*主体css*/
.scroll_img_wrap{width:612px;margin: 10px auto;}
#scroll_img{width:590px;overflow:hidden;float:left;*position:relative;border: 1px #ccc solid;}/*可视区域宽度*/
.scroll_img_list{width:9999px;}
.scroll_img_list li{float:left;width:140px;margin-right:10px;}/*items*/
.scroll_img_list li p{text-align:center;}
.scroll_img_list li p a{text-decoration:none;color:#666;}
.left_btn,.right_btn{float:left;}
希望本文所述对大家的javascript程序设计有所帮助。
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