用jQuery实现最简单的滚屏效果(转)

<!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>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
<style type="text/css">
ul,li{margin:
0;padding:0}
#scrollDiv{width:300px;height:100px;min
-height:25px;line-height:25px;border:#ccc 1px solid;overflow:hidden}
#scrollDiv li{height:25px;padding
-left:10px;}
</style>
<script type="text/javascript" src="js/jquery.js"></script>
<script type="text/javascript">
(
function($){
$.fn.extend({
        Scroll:
function(opt,callback){
                
//参数初始化
                if(!opt) var opt={};
                
var _this=this.eq(0).find("ul:first");
                
var        lineH=_this.find("li:first").height(), //获取行高
                        line=opt.line?parseInt(opt.line,10):parseInt(this.height()/lineH,10), //每次滚动的行数,默认为一屏,即父容器高度
                        speed=opt.speed?parseInt(opt.speed,10):500//卷动速度,数值越大,速度越慢(毫秒)
                        timer=opt.timer?parseInt(opt.timer,10):3000//滚动的时间间隔(毫秒)
                if(line==0) line=1;
                
var upHeight=0-line*lineH;
                
//滚动函数
                scrollUp=function(){
                        _this.animate({
                                marginTop:upHeight
                        },speed,
function(){
                                
for(i=1;i<=line;i++){
                                        _this.find(
"li:first").appendTo(_this);
                                }
                                _this.css({marginTop:
0});
                        });
                }
                var timerID
                
//鼠标事件绑定
                _this.hover(function(){
                        clearInterval(timerID);
                },
function(){
                        timerID
=setInterval("scrollUp()",timer);
                }).mouseout();
        }        
})
})(jQuery);

$(document).ready(
function(){
        $(
"#scrollDiv").Scroll({line:4,speed:500,timer:3000});
});
</script>
</head>

<body>
<p>多行滚动演示:</p>
<div id="scrollDiv">
  
<ul>
    
<li>这是公告标题的第一行</li>
    <li>这是公告标题的第二行</li>
    <li>这是公告标题的第三行</li>
    <li>这是公告标题的第四行</li>
    <li>这是公告标题的第五行</li>
    <li>这是公告标题的第六行</li>
    <li>这是公告标题的第七行</li>
    <li>这是公告标题的第八行</li>
  </ul>
</div>
</body>
</html>
posted @ 2008-01-15 23:22  没剑  阅读(3974)  评论(1编辑  收藏  举报