50 lines
1.3 KiB
HTML
50 lines
1.3 KiB
HTML
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="utf-8">
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<title></title>
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<style>
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#adv {
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width: 705px;
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margin: 0 auto;
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}
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</style>
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</head>
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<body>
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<div id="adv">
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<img src="img/slide-1.jpg" alt="" width="705">
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</div>
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<script>
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var index = 0;
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var images = ['slide-1.jpg', 'slide-2.jpg', 'slide-3.jpg', 'slide-4.jpg']
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// 通过document对象获取页面元素的常用方法有5个:
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// document.getElementById('...') ==> 通过ID获取单个元素
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// document.getElementsByTagName('...') ==> 通过标签名获取元素的列表
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// document.getElementsByClassName('...') ==> 通过类名获取元素的列表
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// document.querySelector('...') ==> 通过样式表选择器获取单个元素
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// document.querySelectorAll('...') ==> 通过样式表选择器获取元素的列表
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var img = document.querySelector('img');
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// var img = document.getElementsByTagName('img')[0];
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var timerId;
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startIt();
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var div = document.querySelector('#adv');
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div.addEventListener('mouseover', stopIt);
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div.addEventListener('mouseout', startIt);
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function startIt() {
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timerId = window.setInterval(function() {
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index += 1;
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index %= images.length;
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img.src = 'img/' + images[index];
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}, 2000);
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}
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function stopIt() {
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window.clearInterval(timerId);
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}
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</script>
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</body>
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</html>
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