45 lines
1.1 KiB
HTML
45 lines
1.1 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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* {
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margin: 0;
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padding: 0;
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}
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#container {
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margin: 10px 20px;
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}
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#container li {
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float: left;
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list-style: none;
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width: 60px;
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height: 60px;
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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="container">
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<img src="img/picture-1.jpg" alt="狗屎">
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<ul id="items">
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<li><img src="img/thumb-1.jpg" alt=""></li>
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<li><img src="img/thumb-2.jpg" alt=""></li>
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<li><img src="img/thumb-3.jpg" alt=""></li>
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</ul>
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</div>
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<script>
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var img = document.querySelector('#container>img');
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var images = document.querySelectorAll('#items img');
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for (var i = 0; i < images.length; i += 1) {
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// 事件回调函数在for循环的时候并没有执行所以也取不到循环变量i当前的值
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// JavaScript是动态弱类型语言可以在运行时动态的添加(或删除)对象的属性
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images[i].picture = 'img/picture-' + (i + 1) + '.jpg';
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images[i].addEventListener('mouseover', function(evt) {
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img.src = evt.target.picture;
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});
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}
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</script>
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</body>
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</html>
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