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固定尺寸的图片焦点图案例
<!DOCTYPE html>
<html>
<head>
<title></title>
<meta charset="utf-8">
<style>
ul,
li {
margin: 0;
padding: 0;
list-style: none;
}
#banner {
width: 730px;
height: 454px;
margin: 10px auto;
position: relative;
overflow: hidden;
}
#banner ol {
position: absolute;
right: 10px;
bottom: 10px;
}
#banner ol li {
float: left;
width: 20px;
height: 20px;
line-height: 20px;
text-align: center;
font-size: 12px;
color: #fff;
background: orange;
margin-right: 5px;
font-weight: bold;
}
#left,
#right {
position: absolute;
top: 200px;
width: 30px;
height: 60px;
background: #000;
opacity: 0.8;
}
#left {
left: 20px;
}
#right {
right: 20px;
}
#banner ol li.bg {
color: #000;
background: red;
}
</style>
</head>
<body>
<div id="banner">
<ul>
<li><img src="http://www.mamicode.com/img/1.jpg"></li>
<li><img src="http://www.mamicode.com/img/2.jpg"></li>
<li><img src="http://www.mamicode.com/img/3.jpg"></li>
<li><img src="http://www.mamicode.com/img/4.jpg"></li>
<li><img src="http://www.mamicode.com/img/5.jpg"></li>
</ul>
<ol>
<li class="bg">1</li>
<li>2</li>
<li>3</li>
<li>4</li>
<li>5</li>
</ol>
<div id="left"></div>
<div id="right"></div>
</div>
<script>
var banner, left, right, pics, nums;
banner = document.getElementById("banner")
left = document.getElementById("left")
right = document.getElementById("right")
pics = document.getElementsByTagName("ul")[0].getElementsByTagName("li")
nums = document.getElementsByTagName("ol")[0].getElementsByTagName("li")
//自动播放的开始
var k
k = 0
function auto() {
for (var i = 0; i <= pics.length - 1; i++) {
pics[i].style.display = "none"
nums[i].className = ""
}
k++;
if (k > pics.length - 1) {
k = 0
}
pics[k].style.display = "block"
nums[k].className = "bg"
}
sl = setInterval(auto, 1000)
//自动播放的结束
//鼠标滑过对应的数字的时候，对应的图片出现开始
for (var j = 0; j <= nums.length - 1; j++) {
nums[j].index = j
nums[j].onmouseover = function() {
for (var i = 0; i <= pics.length - 1; i++) {
pics[i].style.display = "none"
nums[i].className = ""
}
pics[this.index].style.display = "block"
this.className = "bg"
k = this.index
}
}
//鼠标滑过对应的数字的时候，对应的图片出现结束
//单击上一张 下一张开始
right.onclick = function() {
k++;
if (k > pics.length - 1) {
k = 0
}
for (var i = 0; i <= pics.length - 1; i++) {
pics[i].style.display = "none"
nums[i].className = ""
}
pics[k].style.display = "block"
nums[k].className = "bg"
}
left.onclick = function() {
k--;
if (k < 0) {
k = pics.length - 1
}
for (var i = 0; i <= pics.length - 1; i++) {
pics[i].style.display = "none"
nums[i].className = ""
}
pics[k].style.display = "block"
nums[k].className = "bg"
}
//单击上一张 下一张结束
banner.onmouseover = function() {
clearInterval(sl)
left.style.display = "block"
right.style.display = "block"
}
banner.onmouseout = function() {
sl = setInterval(auto, 1000)
left.style.display = "none"
right.style.display = "none"
}
</script>
</body>
</html>
固定尺寸的图片焦点图案例
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