利用JS做网页特效——大图轮播
大图轮播完整流程代码操作：
<style>
* {
margin: 0px;
padding: 0px;
}
.stage {
width: 500px;
height: 300px;
border: 5px solid black;
margin: 200px;
position: relative;
overflow: hidden;
}
.to-left,
.to-right {
position: absolute;
top: 0px;
width: 50px;
height: 300px;
background-color: black;
color: white;
font-size: 30px;
text-align: center;
line-height: 300px;
opacity: 0.3;
}
.to-left {
left: 0px;
}
.to-right {
right: 0px;
}
.to-left:hover,
.to-right:hover {
cursor: pointer;
opacity: 0.5;
}
.banner {
width: 3000px;
height: 300px;
}
.items {
float: left;
width: 500px;
height: 300px;
background-color: blanchedalmond;
font-size: 100px;
text-align: center;
line-height: 300px;
}
</style>
</head>
<!--大图轮播特效-->
<body>
<div class="stage">
<div class="to-left">
<</div>
<div class="to-right">></div>
<div class="banner">
<div class="items">1</div>
<div class="items" style="">2</div>
<div class="items" style="">3</div>
<div class="items" style="">4</div>
<div class="items" style="">5</div>
<div class="items">1</div>
</div>
</div>
</body>
</html>
<script>
var to_right = document.getElementsByClassName('to-right')[0];
var to_left = document.getElementsByClassName('to-left')[0];
var banner = document.getElementsByClassName('banner')[0];
var arr = [];
var count = 1;
to_right.onclick = function() {
toRight();
}
function toRight(){
arr.push(window.setInterval("moveLeft()", 30));
}
to_left.onclick = function() {
toLeft();
}
function toLeft(){
arr.push(window.setInterval("moveRight()", 30));
}
function moveLeft() {
if(count < 5) {
if(banner.offsetLeft > count * (-500)) {
banner.style.marginLeft = banner.offsetLeft - 20 + "px";
} else {
for(var x in arr) {
window.clearInterval(arr[x]);
}
count++;
}
// 连接点
}else{
if(banner.offsetLeft > count * (-500)) {
banner.style.marginLeft = banner.offsetLeft - 20 + "px";
} else {
for(var x in arr) {
window.clearInterval(arr[x]);
}
count = 1;
banner.style.marginLeft = 0 + 'px';
}
}
}
function moveRight() {
if(count-1 >0) {
if(banner.offsetLeft < (count-2) * (-500)) {
banner.style.marginLeft = banner.offsetLeft + 20 + "px";
} else {
for(var x in arr) {
window.clearInterval(arr[x]);
}
count--;
}
}
}
window.setInterval("toRight()",1750);
</script>
