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幻灯片(jquery实现)

html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>幻灯片特效 在线演示 DIVCSS5</title><style type="text/css">body {font-size:12px; color:#222; text-align:center; font-family:Verdana,Arial,Helvetica,sans-serif; background:#f0f0f0;}ul,li {list-style:none; margin:0px; padding:0px;}img {border:0;}/* 以下特效CSS */.focus {width:600px; height:280px; margin:0 auto; overflow:hidden; position:relative;}.focus ul {height:280px; position:absolute;}.focus ul li {float:left; width:600px; height:280px; overflow:hidden; position:relative; background:#000;}.focus ul li div {position:absolute; overflow:hidden;}.focus .btnBg {position:absolute; width:600px; height:20px; left:0; bottom:0; background:#000; display:none;}.focus .btn {position:absolute; width:580px; height:23px; padding:0px 10px 0px 10px; right:0; bottom:6px; text-align:right;}.focus .btn span {display:inline-block; _display:inline; _zoom:1; width:25px; height:24px; line-height:24px; text-align:center; _font-size:0; margin-left:5px; cursor:pointer; background:#fff;}.focus .btn span.on {background:#fff;}.focus .preNext {width:45px; height:100px; position:absolute; top:90px; background:url(/Images/sprite.png) no-repeat 0 0; cursor:pointer;}.focus .pre {left:0;}.focus .next {right:0; background-position:right top;}</style><script type="text/javascript" src="http://www.mamicode.com/Javascript/jquery.js"></script><script type="text/javascript" src="http://www.mamicode.com/Javascript/9.js"></script><script type="text/javascript">	$(document).ready(function(){	  	$.focus("#focus001");	});</script></head><body><div class="focus" id="focus001">    <ul>        <li><a href="http://www.divcss5.com/" target="_blank"><img src="http://www.mamicode.com/Images/01.jpg" alt="jquery特效" /></a></li>        <li><a href="http://www.divcss5.com/" target="_blank"><img src="http://www.mamicode.com/Images/02.jpg" alt="DIVCSS5" /></a></li>        <li><a href="http://www.divcss5.com/css-texiao/texiao735.shtml" target="_blank"><img src="http://www.mamicode.com/Images/03.jpg" alt="点击左右滚动jquery焦点图特效" /></a></li>    </ul></div></body></html>

javascript代码:

$(function() {	jQuery.focus = function(slid) {		var sWidth = $(slid).width(); //获取焦点图的宽度(显示面积)		var len = $(slid).find("ul li").length; //获取焦点图个数		var index = 0;		var picTimer;				//以下代码添加数字按钮和按钮后的半透明条,还有上一页、下一页两个按钮		var btn = "<div class=‘btnBg‘></div><div class=‘btn‘>";		for(var i=0; i < len; i++) {			var ii = i+1;			btn += "<span>"+ii+"</span>";		}		btn += "</div><div class=‘preNext pre‘></div><div class=‘preNext next‘></div>";		$(slid).append(btn);		$(slid).find("div.btnBg").css("opacity",0.5);			//为小按钮添加鼠标滑入事件,以显示相应的内容		$(slid+" div.btn span").css("opacity",0.4).mouseenter(function() {			index = $(slid+" .btn span").index(this);			showPics(index);		}).eq(0).trigger("mouseenter");			//上一页、下一页按钮透明度处理		$(slid+" .preNext").css("opacity",0.2).hover(function() {			$(this).stop(true,false).animate({"opacity":"0.5"},300);		},function() {			$(this).stop(true,false).animate({"opacity":"0.2"},300);		});			//上一页按钮		$(slid+" .pre").click(function() {			index -= 1;			if(index == -1) {index = len - 1;}			showPics(index);		});			//下一页按钮		$(slid+" .next").click(function() {			index += 1;			if(index == len) {index = 0;}			showPics(index);		});			//本例为左右滚动,即所有li元素都是在同一排向左浮动,所以这里需要计算出外围ul元素的宽度		$(slid+" ul").css("width",sWidth * (len));				//鼠标滑上焦点图时停止自动播放,滑出时开始自动播放		$(slid).hover(function() {			clearInterval(picTimer);		},function() {			picTimer = setInterval(function() {				showPics(index);				index++;				if(index == len) {index = 0;}			},2000); //此4000代表自动播放的间隔,单位:毫秒		}).trigger("mouseleave");				//显示图片函数,根据接收的index值显示相应的内容		function showPics(index) { //普通切换			var nowLeft = -index*sWidth; //根据index值计算ul元素的left值			$(slid+" ul").stop(true,false).animate({"left":nowLeft},300); //通过animate()调整ul元素滚动到计算出的position			$(slid+" .btn span").removeClass("on").eq(index).addClass("on"); //为当前的按钮切换到选中的效果			$(slid+" .btn span").stop(true,false).animate({"opacity":"0.4"},300).eq(index).stop(true,false).animate({"opacity":"1"},300); //为当前的按钮切换到选中的效果		}		};	});

  

幻灯片(jquery实现)