Rumah > Artikel > hujung hadapan web > JavaScript如何实现大图轮播效果
本文实例为大家分享了js图片轮播效果的具体代码，供大家参考，具体内容如下
<head>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>大图轮播</title>
<style type="text/css">
* {
margin: 0px;
padding: 0px;
}
#container {
width: 500px;
height: 300px;
/*border: 1px solid black;*/
position: relative;
overflow: hidden;
}
.btn {
height: 100%;
width: 30px;
/*border: 1px solid red;*/
position: absolute;
text-align: center;
line-height: 300px;
font-size: 40px;
font-weight: 900;
color: black;
opacity: 0.3;
transition: 0.6s;
z-index: 999;
background-color: white;
}
.btn:hover {
cursor: pointer;
opacity: 0.8;
}
#left-btn {
left: 0px;
top: 0px;
}
#right-btn {
right: 0px;
top: 0px;
}
#ad-container {
width: 2500px;
height: 300px;
/*border: 1px solid blue;*/
position: relative;
}
.ad {
width: 500px;
height: 300px;
float: left;
text-align: center;
line-height: 300px;
font-size: 100px;
font-family: "微软雅黑";
}
</style>
</head>
<body>
<p id="container">
<p id="left-btn" class="btn">
<</p>
<p id="right-btn" class="btn">></p>
<p id="ad-container">
<p class="ad" style="background-color: mediumpurple;">1</p>
<p class="ad" style="background-color: yellowgreen;">2</p>
<p class="ad" style="background-color: rosybrown;">3</p>
<p class="ad" style="background-color: salmon;">4</p>
<p class="ad" style="background-color: cyan;">5</p>
</p>
</p>
</body>
</html>
<script type="text/javascript">
var rightBtn = document.getElementById("right-btn");
var leftBtn = document.getElementById("left-btn");
var n = 1;
/* var count = 1*/;
var arr = new Array();
/* var m=1;
*/ rightBtn.onclick = function() {
var x = window.setInterval("to_right()", 20);
arr.push(x);
}
function clear() {
for(var i in arr) {
window.clearInterval(arr[i]);
}
}
function to_right() {
var adContainer = document.getElementById("ad-container");
if(n == 5) {
clear();
} else if(adContainer.offsetLeft != n * (-500)) {
adContainer.style.marginLeft = adContainer.offsetLeft - 25 + "px";
} else {
n++;
clear();
}
}
var arr1 = new Array();
leftBtn.onclick = function() {
var y = window.setInterval("to_left()", 20);
arr1.push(y);
}
function clear2() {
for(var y in arr1) {
window.clearInterval(arr1[y]);
}
}
function to_left() {
var adContainer = document.getElementById("ad-container");
if(n == 1) {
clear2();
} else if(adContainer.offsetLeft != (n-2) * (-500)) {
adContainer.style.marginLeft = adContainer.offsetLeft + 25 + "px";
} else {
n--;
clear2();
}
}
</script>
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