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<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    <script src="http://www.5icool.org/demo/2012/a00552/jquery.min.js">
    </script>
    <script>

$(function() {
	var sWidth = $("#focus").width(); //获取焦点图的宽度（显示面积）
	var len = $("#focus 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++) {
		btn += "<span></span>";
	}
	btn += "</div><div class='preNext pre'></div><div class='preNext next'></div>";
	$("#focus").append(btn);
	$("#focus .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
	$("#focus .btn span").css("opacity",0.4).mouseenter(function() {
		index = $("#focus .btn span").index(this);
		showPics(index);
	}).eq(0).trigger("mouseenter");

	//上一页、下一页按钮透明度处理
	$("#focus .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
	$("#focus .pre").click(function() {
		index -= 1;
		if(index == -1) {index = len - 1;}
		showPics(index);
	});

	//下一页按钮
	$("#focus .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
	$("#focus 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
	$("#focus").hover(function() {
		clearInterval(picTimer);
	},function() {
		picTimer = setInterval(function() {
			showPics(index);
			index++;
			if(index == len) {index = 0;}
		},4000); //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
		$("#focus ul").stop(true,false).animate({"left":nowLeft},300); //通过animate()调整ul元素滚动到计算出的position
		//$("#focus .btn span").removeClass("on").eq(index).addClass("on"); //为当前的按钮切换到选中的效果
		$("#focus .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

		var bgcolor = $("#focus ul li").eq(index).children("a").css("background-color");

		$(".wrapper").stop(true,false).css("background-color",bgcolor);
	}
});



    </script>
</head>

<body>

<style type="text/css">
* {margin:0; padding:0;}
body {font-size:12px; color:#222; font-family:Verdana,Arial,Helvetica,sans-serif; background:#f0f0f0;}
.clearfix:after {content: "."; display: block; height: 0; clear: both; visibility: hidden;}
.clearfix {zoom:1;}
ul,li {list-style:none;}
img {border:0;}

.wrapper {width:100%; padding-bottom:50px;}

h1 {height:50px; line-height:50px; font-size:22px; font-weight:normal; font-family:"Microsoft YaHei",SimHei;}

.download {display:block; width:120px; height:34px; background:#333; line-height:34px; font-size:14px; font-weight:bold; text-align:center; color:#fff; border:1px solid #999; margin-top:10px;}
.fenxiang {height:16px; padding:20px 0 10px; margin-bottom:10px;}

.shuoming {margin-top:20px; border:1px solid #ccc; padding-bottom:10px;}
.shuoming dt {height:30px; line-height:30px; font-weight:bold; text-indent:10px;}
.shuoming dd {line-height:20px; padding:5px 20px;}

/* qqshop focus */
#focus {width:800px; height:280px; overflow:hidden; position:relative; margin:0 auto;}
#focus ul {height:380px; position:absolute;}
#focus ul li {float:left; width:800px; height:280px; overflow:hidden; position:relative; background:#000;}
#focus ul li div {position:absolute; overflow:hidden;}
#focus .btnBg {position:absolute; width:800px; height:20px; left:0; bottom:0; background:#000;}
#focus .btn {position:absolute; width:780px; height:10px; padding:5px 10px; right:0; bottom:0; text-align:right;}
#focus .btn span {display:inline-block; _display:inline; _zoom:1; width:25px; height:10px; _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(http://www.5icool.org/demo/2012/a00552/img/sprite.png) no-repeat 0 0; cursor:pointer;}
#focus .pre {left:0;}
#focus .next {right:0; background-position:right top;}
</style>

<div class="wrapper">

    <div id="focus">
        <ul>
            <li>
                <a style="background-color: yellow;" href="http://www.5icool.org/"><img src="http://www.5icool.org/demo/2012/a00552/img/01.jpg" alt="QQ商城焦点图效果下载" /></a>
            </li>
            <li>
                <a style="background-color: blue;" href="http://www.5icool.org/"><img src="http://www.5icool.org/demo/2012/a00552/img/02.jpg" alt="QQ商城焦点图效果教程" /></a>
            </li>
            <li>
                <a style="background-color: black;" href="http://www.5icool.org/"><img src="http://www.5icool.org/demo/2012/a00552/img/03.jpg" alt="jquery商城焦点图效果" /></a>
            </li>
            <li>
                <a style="background-color: pink;" href="http://www.5icool.org/"><img src="http://www.5icool.org/demo/2012/a00552/img/04.jpg" alt="jquery商城焦点图代码" /></a>
            </li>
            <li>
                <a style="background-color: purple;" href="http://www.5icool.org/"><img src="http://www.5icool.org/demo/2012/a00552/img/05.jpg" alt="jquery商城焦点图源码" /></a>
            </li>
        </ul>
    </div>
</div>

<style type="text/css">
	#ttt{
		width: 100%;
		height: 50px;
	}
</style>
<div id="ttt"></div>

</body>

</html>

 

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