<div id="benner">
<div class="img">
<img src="http://www.jq22.com/img/cs/500x300-1.png" class="imga active">
<img src="http://www.jq22.com/img/cs/500x300-2.png" class="imga">
<img src="http://www.jq22.com/img/cs/500x300-3.png" class="imga">
<img src="http://www.jq22.com/img/cs/500x300-4.png" class="imga">
<img src="http://www.jq22.com/img/cs/500x300-5.png" class="imga">
<img src="http://www.jq22.com/img/cs/500x300-6.png" class="imga">
<img src="http://www.jq22.com/img/cs/500x300-7.png" class="imga">
</div>
<ul class="title">
<li class="nr active"></li>
<li class="nr"></li>
<li class="nr"></li>
<li class="nr"></li>
<li class="nr"></li>
<li class="nr"></li>
<li class="nr"></li>
</ul>
</div>
=============================CSS==================================
* {
margin:0px;
padding:0px;
}
#benner {
width:790px;
height:340px;
margin-left:15%;
margin-top:10px;
}
#benner .imga {
display:none;
}
#benner .img .active {
display:block;
}
#benner .title {
width:;
height:16px;
background-color:rgba(226,226,226,0.6);
border-radius:30px;
margin-top:-35px;
float:left;
margin-left:40%;
margin-right:40%;
padding:6px 0px 0px 10px;
position:relative;
}
#benner .title .nr {
list-style:none;
width:10px;
height:10px;
background:#fff;
border-radius:10px;
float:left;
margin-right:10px;
margin-bottom:0px;
}
#benner .title .active {
background:#db192a;
}
===========================================JS========================================
window.onload = function() {
benner('#benner', '.nr', '.imga')
function benner(parent, controller, mod) {
var num = 0;
var controller = $(controller);
var mod = $(mod);
var benner = $(parent);
var autoPlayTime = 1500;
var imgNum = mod.length - 1;
var auto;
autoPlay();
//根據傳進來的名字獲取這個名字所對應的對象
function $(name) {
if (name[0] == '#') {
return document.getElementById(name.substr(1));
} else if (name[0] == '.') {
return document.getElementsByClassName(name.substr(1));
} else {
return document.getElementsByTagName(name);
}
}
//實現鼠標劃過圓點,變化圖片的效果
//function change(controller, mod){
//遍歷控制器,綁定鼠標劃過事件
for (var i = 0; i < controller.length; i++) {
//給控制器加個索引,並把i值賦值給索引
controller[i].index = i;
//給所有的控制器都加劃過事件
controller[i].onmouseover = function() {
for (var j = 0; j < controller.length; j++) {
//將所有控制器改爲默認樣式
controller[j].className = 'nr';
}
//改變所選的控制器樣式
this.className = 'nr active';
//將模型改爲默認樣式
for (var x = 0; x < mod.length; x++) {
mod[x].className = 'imga';
}
//改變所選控制器對應的模型的樣式
mod[this.index].className = 'imga active';
}
}
//}
//綁定鼠標移入,暫停播放圖片
benner.onmouseover = function() {
clearInterval(auto);
}
//綁定鼠標離開,繼續播放
benner.onmouseleave = function() {
autoPlay();
}
//指定播放那個圖片
function play(num) {
for (var j = 0; j < controller.length; j++) {
controller[j].className = 'nr';
}
controller[num].className = 'nr active';
for (var x = 0; x < mod.length; x++) {
mod[x].className = 'imga';
}
mod[num].className = 'imga active';
}
//自動播放
function autoPlay() {
auto = setInterval(function() {
if (num > imgNum) {
num = 0;
}
play(num);
num++;
}, autoPlayTime)
}
}
}