Jquery轮播图片

<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ page import="java.util.Random"%>
<!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>
<!--原理简述】

这里大概说一下整个流程:

1,将除了第一张以外的图片全部隐藏,

2,获取第一张图片的alt信息显示在信息栏,并添加点击事件

3,为4个按钮添加点击侦听,点击相应的按钮,用fadeOut,fadeIn方法显示图片

4,设置setInterval,定时执行切换函数

【代码说明】

filter(":visible") :获取所有可见的元素

unbind():从匹配的元素中删除绑定的事件

siblings:取得一个包含匹配的元素集合中每一个元素的所有唯一同辈元素的元素集合-->
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>图片轮播切换效果-</title>
<style type="text/css">

#banner {position:relative; width:478px; height:286px; border:1px solid #666;

overflow:hidden;}
#banner_list img {border:0px;}
#banner_bg {position:absolute; bottom:0;background-color:#000;height:30px;filter: Alpha

(Opacity=30);opacity:0.3;z-index:1000;cursor:pointer; width:478px; }
#banner_info{position:absolute; bottom:0; left:5px;height:22px;color:#fff;z-

index:1001;cursor:pointer}
#banner_text {position:absolute;width:120px;z-index:1002; right:3px; bottom:3px;}
#banner ul {position:absolute;list-style-type:none;filter: Alpha(Opacity=80);opacity:0.8;

border:1px solid #fff;z-index:1002;
margin:0; padding:0; bottom:3px; right:5px;}
#banner ul li { padding:0px 8px;float:left;display:block;color:#FFF;border:#e5eaff 1px

solid;background:#6f4f67;cursor:pointer}
#banner ul li.on { background:#900}
#banner_list a{position:absolute;} <!-- 让四张图片都可以重叠在一起-->
</style>

<script type="text/javascript" src="jquery-1.2.6.pack.js"></script>
<script type="text/javascript">
var t = n = 0, count;
$(document).ready(function(){
count=$("#banner_list a").length;
$("#banner_list a:not(:first-child)").hide();
$("#banner_info").html($("#banner_list a:first-child").find("img").attr('alt'));
$("#banner_info").click(function(){window.open($("#banner_list a:first-child").attr('href'), "_blank")});
$("#banner li").click(function() {
var i = $(this).text() - 1;//获取Li元素内的值,即1,2,3,4
n = i;
if (i >= count) return;
$("#banner_info").html($("#banner_list a").eq(i).find("img").attr

('alt'));
$("#banner_info").unbind().click(function(){window.open

($("#banner_list a").eq(i).attr('href'), "_blank")})
$("#banner_list a").filter(":visible").fadeOut(500).parent

().children().eq(i).fadeIn(1000);
document.getElementById("banner").style.background="";
$(this).toggleClass("on");
$(this).siblings().removeAttr("class");
});
t = setInterval("showAuto()", 4000);
$("#banner").hover(function(){clearInterval(t)}, function(){t = setInterval

("showAuto()", 4000);});
})

function showAuto()
{
n = n >=(count - 1) ? 0 : ++n;
$("#banner li").eq(n).trigger('click');
}
//function abc()
//{
//window.location.href="random.jsp";
//setTimeout("abc()",140000);
//}
setTimeout("location.href='random.jsp'",15000);//刷新页面

</script>

</head>

<body>
<%-- 取随机数,数字对应图片的名字--%>
<%int arr[] = {1,2,3,4,5,6,7,8,9,10,11};
int suiji[]=new int[4];
int i;
int len = arr.length;
for(i=0;i<4;i++){
Random random = new Random();
int arrIdx = random.nextInt(len-1);
suiji[i]= arr[arrIdx]; }
%>
<div id="banner">
<div id="banner_bg"></div> <!--标题背景-->
<div id="banner_info"></div> <!--标题-->
<ul>
<li class="on">1</li>
<li>2</li>
<li>3</li>
<li>4</li>
</ul>
<div id="banner_list">
<a href="#" target="_blank"><img src="imgs/<%=suiji[0] %>.jpg" title="" alt="" /></a>
<a href="#" target="_blank"><img src="imgs/<%=suiji[1] %>.jpg" title="" alt="" /></a>
<a href="#" target="_blank"><img src="imgs/<%=suiji[2] %>.jpg" title="" alt="" /></a>
<a href="#" target="_blank"><img src="imgs/<%=suiji[3] %>.jpg" title="" alt="" /></a>
</div>
</div>
</body>
</html>

posted @ 2016-03-16 10:53  牙儿  阅读(169)  评论(0编辑  收藏  举报