< !doctype html > <html > <head > <meta charset = "utf-8" > <title > jQuery实现无缝图片滚动效果 - jq22.com < /title>
<script src="http:/ / libs.baidu.com / jquery / 1.7.2 / jquery.min.js "></script>
<style>
*{
padding: 0;
margin: 0;
}
li{
list-style-type: none;
margin-top: 40px;
}
body{
margin: 20px;
}
.wrap{
border: 3px solid #f00;
width: 600px;
height: 200px;
position: relative;
overflow: hidden;
}
.wrap ul{
overflow: hidden;
position:absolute;
width: 1600px;
left: 0;
top: 0;
_height:1px;
}
.wrap ul li{
float: left;
width: 200px;
}</style>
</head>
<body>
<a href="javascript: ;
" class="goLeft ">向左走</a> <a href="javascript: ;
" class="goRight ">向右走</a>
<div class="wrap ">
<ul>
<li><img src="img / 1.bmp "/></li>
<li><img src="img / 2.bmp "/></li>
<li><img src="img / 3.bmp "/></li>
<li><img src="img / 4.bmp "/></li>
<li><img src="img / 5.bmp "/></li>
</ul>
</div>
<script>
// 如果想要使一个元素运动起来，一般情况下这个元素须要具有position属性absolute/relative
$(function(){
var oul = $('.wrap ul');
var oulHtml = oul.html();
oul.html(oulHtml+oulHtml)
var timeId = null;
var ali = $('.wrap ul li');
var aliWidth = ali.eq(0).width();
var aliSize = ali.size();
var ulWidth = aliWidth*aliSize;
oul.width(ulWidth); //1600px
var speed = 2;
function slider(){
if(speed<0){
if(oul.css('left')==-ulWidth/2+'px'){
oul.css('left',0);
}
oul.css('left','+=-2px');
}
if(speed>0){
if(oul.css('left')=='0px'){
oul.css('left',-ulWidth/2+'px');
}
oul.css('left','+='+speed+'px');
}
}
// setInterval()函数的作用是：每隔一段时间，执行该函数里的代码
timeId = setInterval(slider,30);
$('.wrap').mouseover(function(){
// clearInterval()函数的作用是用来清除定时器
clearInterval(timeId);
});
$('.wrap').mouseout(function(){
timeId = setInterval(slider,30);
});
$('.goLeft').click(function(){
speed=-2;
});
$('.goRight').click(function(){
speed=2;
});
});
</script>
</body>
</html>
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