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基于JQuery的实现图片轮播效果(焦点图)
基于JQuery的实现图片轮播效果(焦点图)
完整的演示代码:
<!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>JQuery实现图片轮播效果 </title> <script src="http://img.phpstudy.net/jslib/jquery/jquery14.js" type="text/javascript"></script> <style type="text/css"><!-- #banner {position:relative; width:478px; height:286px; border:1px solid #666; overflow:hidden; font-size:16px} #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:4px; 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; z-index:1002; margin:0; padding:0; bottom:3px; right:5px; height:20px} #banner ul li { padding:0 8px; line-height:18px;float:left;display:block;color:#FFF;border:#e5eaff 1px solid;background-color:#6f4f67;cursor:pointer; margin:0; font-size:16px;} #banner_list a{position:absolute;} <! 让四张图片都可以重叠在一起 --></style> </head> <body> <p>【实例演示】</p> <div id="banner"> <div id="banner_bg"></div> <!--标题背景--> <div id="banner_info"></div> <!--标题--> <ul> <li>1</li> <li>2</li> <li>3</li> <li>4</li> </ul> <div id="banner_list"> 如需引入外部Js需刷新才能执行]</div><BR>【原理简述】 <BR>这里大概说一下整个流程： <BR>1，将除了第一张以外的图片全部隐藏， <BR>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 <BR>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 <BR>4，设置setInterval，定时执行切换函数 <BR>【代码说明】 <BR>filter(":visible") :获取所有可见的元素 <BR>unbind()：从匹配的元素中删除绑定的事件 <BR>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 <BR>例：找到每个div的所有同辈元素中带有类名为selected的元素。 <BR><div class="codetitle"><span style="CURSOR: pointer" onclick="doCopy('code45124')"><U>复制代码</U></span> 代码如下:</div><div class="codebody" id="code45124"><BR><p>Hello</p><div><span>Hello Again</span></div><p>And Again</p> <BR></div><BR>执行 $("div").siblings()，结果 <BR><div class="codetitle"><span style="CURSOR: pointer" onclick="doCopy('code23097')"><U>复制代码</U></span> 代码如下:</div><div class="codebody" id="code23097"><BR>[ <p>Hello</p>, <p>And Again</p> ] <BR></div><BR>【程序源码】 <BR>HTML部分： <BR><div class="codetitle"><span style="CURSOR: pointer" onclick="doCopy('code62618')"><U>复制代码</U></span> 代码如下:</div><div class="codebody" id="code62618"> <BR><div id="banner"> <BR><div id="banner_bg"></div> <!--标题背景--> <BR><div id="banner_info"></div> <!--标题--> <BR><ul> <BR><li>1</li> <BR><li>2</li> <BR><li>3</li> <BR><li>4</li> <BR></ul> <BR><div id="banner_list"> <BR><a href="#" target="_blank"><img src="imgs/p1.jpg" title="橡树小屋的blog" alt="橡树小屋的blog" /></a> <BR><a href="#" target="_blank"><img src="imgs/p5.jpg" title="橡树小屋的blog" alt="橡树小屋的blog" /></a> <BR><a href="#" target="_blank"><img src="imgs/p3.jpg" title="橡树小屋的blog" alt="橡树小屋的blog" /></a> <BR><a href="#" target="_blank"><img src="imgs/p4.jpg" title="橡树小屋的blog" alt="橡树小屋的blog" /></a> <BR></div> <BR></div> <BR></div> <BR>CSS部分： <BR><div class="codetitle"><span style="CURSOR: pointer" onclick="doCopy('code44055')"><U>复制代码</U></span> 代码如下:</div><div class="codebody" id="code44055"> <BR><style type="text/css"> <BR>#banner {position:relative; width:478px; height:286px; border:1px solid #666; overflow:hidden;} <BR>#banner_list img {border:0px;} <BR>#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; } <BR>#banner_info{position:absolute; bottom:0; left:5px;height:22px;color:#fff;z-index:1001;cursor:pointer} <BR>#banner_text {position:absolute;width:120px;z-index:1002; right:3px; bottom:3px;} <BR>#banner ul {position:absolute;list-style-type:none;filter: Alpha(Opacity=80);opacity:0.8; border:1px solid #fff;z-index:1002; <BR>margin:0; padding:0; bottom:3px; right:5px;} <BR>#banner ul li { padding:0px 8px;float:left;display:block;color:#FFF;border:#e5eaff 1px solid;background-color:#6f4f67;cursor:pointer} <BR>#banner_list a{position:absolute;} <!-- 让四张图片都可以重叠在一起--> <BR></style> <BR></div> <BR>JS部分: <BR><div class="codetitle"><span style="CURSOR: pointer" onclick="doCopy('code26302')"><U>复制代码</U></span> 代码如下:</div><div class="codebody" id="code26302"> <BR><script type="text/javascript" src="jquery-1.2.6.pack.js"></script> <BR><script type="text/javascript"> <BR>var t = n = 0, count; <BR>$(document).ready(function(){ <BR>count=$("#banner_list a").length; <BR>$("#banner_list a:not(:first-child)").hide(); <BR>$("#banner_info").html($("#banner_list a:first-child").find("img").attr('alt')); <BR>$("#banner_info").click(function(){window.open($("#banner_list a:first-child").attr('href'), "_blank")}); <BR>$("#banner li").click(function() { <BR>var i = $(this).text() - 1;//获取Li元素内的值，即1，2，3，4 <BR>n = i; <BR>if (i >= count) return; <BR>$("#banner_info").html($("#banner_list a").eq(i).find("img").attr('alt')); <BR>$("#banner_info").unbind().click(function(){window.open($("#banner_list a").eq(i).attr('href'), "_blank")}) <BR>$("#banner_list a").filter(":visible").fadeOut(500).parent().children().eq(i).fadeIn(1000); <BR>$(this).css({"background":"#be2424",'color':'#000'}).siblings().css({"background":"#6f4f67",'color':'#fff'}); <BR>}); <BR>t = setInterval("showAuto()", 4000); <BR>$("#banner").hover(function(){clearInterval(t)}, function(){t = setInterval("showAuto()", 4000);}); <BR>}) <BR>function showAuto() <BR>{ <BR>n = n >=(count - 1) ? 0 : ++n; <BR>$("#banner li").eq(n).trigger('click'); <BR>} <BR></script> <BR></div> <hr> <span class="prev">« </span><br> <span class="next">» </span> <hr> <table> </table> </div> </div> </div><!--/.col-xs-6.col-lg-4--> <div class="col-md-4"> <div class="panel panel-default"> <div class="panel-heading"> <a href="/php/">PHP教程</a></div> <div class="list-group"> <a href="/php/1.html" class="list-group-item">PHP简介</a> <a href="/php/8.html" class="list-group-item">PHP基本语法</a> <a href="/php/12.html" class="list-group-item">PHP类型</a> <a href="/php/24.html" class="list-group-item">PHP变量</a> <a href="/php/34.html" class="list-group-item">PHP运算符</a> <a href="/php/47.html" class="list-group-item">PHP控制结构</a> <a href="/php/67.html" class="list-group-item">PHP函数</a> <a href="/php/74.html" class="list-group-item">PHP类与对象</a> <a href="/php/110.html" class="list-group-item">PHP异常处理</a> <a href="/php/function.php" class="list-group-item">函数库分类</a> </div> </div> </div> </div><!--/row--> <!--div style="margin:0 auto;clear:both;text-align:center;width:970px;margin-bottom:8px;"></div--> <div class="panel panel-default"> <div class="panel-heading">快速导航</div> <div class="panel-body"> <a href="/list.php?id=1">PHP</a> <a href="/list.php?id=2">MySQL</a> <a href="/list.php?id=3">HTML</a> <a href="/list.php?id=4">CSS</a> <a href="/list.php?id=5">JavaScript</a> <a href="/list.php?id=6">MSSQL</a> <a href="/list.php?id=10">AJAX</a> <a href="/list.php?id=8">.NET</a> <a href="/list.php?id=9">JSP</a> <a href="/list.php?id=14">Linux</a> <a href="/list.php?id=17">Mac</a> <a href="/list.php?id=7">ASP</a> <a href="/list.php?id=11">服务器</a> <a href="/list.php?id=15">SQL</a> <a href="/list.php?id=16">jQuery</a> <a href="/list.php?id=18">C#</a> <a href="/list.php?id=19">C++</a> <a href="/list.php?id=20">java</a> <a href="/list.php?id=21">Android</a> <a href="/list.php?id=22">IOS</a> <a href="/list.php?id=23">oracle</a> <a href="/list.php?id=24">MongoDB</a> <a href="/list.php?id=26">SQLite</a> <a href="http://wamp.phpstudy.net/">wamp</a> <a href="/jiaotong/">交通频道</a> <span style="display:none"> </span> </div> </div> <hr> </div><!--/.container--> <div class="bottom"> <div class="container"> Copyright © 2016 phpStudy | 豫ICP备2021030365号-3<script src="/images/foot.js?1"></script> </div> </div> <script src="/js/foot2.js"></script> <script src="http://cdn.bootcss.com/jquery/1.11.2/jquery.min.js"></script> <script src="http://cdn.bootcss.com/bootstrap/3.3.4/js/bootstrap.min.js"></script> </body> </html>