jquery+js gets focus control picture
This time I will bring you jquery js to get the focus control picture. What are the precautions for jquery js to get the focus control picture? The following is a practical case, let's take a look.
<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title> </title> <meta name="description" content="jquery "/> <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:800px;margin:0 auto;padding-bottom:50px;} h1{height:50px;line-height:50px;font-size:22px;font-weight:normal;font-family:"Microsoft YaHei",SimHei;margin-bottom:20px;} /* focus */ #focus{width:800px;height:280px;overflow:hidden;position:relative;} #focus ul{height:380px;position:absolute;} #focus ul li{float:left;width:800px;height:280px;overflow:hidden;position:relative;background:#000;} #focus ul li p{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(img/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://jt.875.cn/js/jquery.js"></script> <script type="text/javascript"> $(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 = "<p class='btnBg'></p><p class='btn'>"; for(var i=0; i < len; i++) { btn += "<span></span>"; } btn += "</p><p class='preNext pre'></p><p class='preNext next'></p>"; $("#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).mouseover(function() { index = $("#focus .btn span").index(this); showPics(index); }).eq(0).trigger("mouseover"); //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").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 } }); </script> </head> <body> <p class="wrapper"> <h1>jquery图片滚动仿QQ商城带左右按钮控制焦点图片切换滚动</h1> <p id="focus"> <ul> <li><a href="http://www.875.cn/" target="_blank"><img src="img/01.jpg" alt="QQ商城焦点图效果下载" /></a></li> <li><a href="http://www.875.cn/" target="_blank"><img src="img/02.jpg" alt="QQ商城焦点图效果教程" /></a></li> <li><a href="http://www.875.cn/" target="_blank"><img src="img/03.jpg" alt="jquery商城焦点图效果" /></a></li> <li><a href="http://www.875.cn/" target="_blank"><img src="img/04.jpg" alt="jquery商城焦点图代码" /></a></li> <li><a href="http://www.875.cn/" target="_blank"><img src="img/05.jpg" alt="jquery商城焦点图源码" /></a></li> </ul> </p><!--focus end--> </p><!-- wrapper end --> </body> </html>
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