现场演示：我的 HTML 文档

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Example of Setting Hover State for Sprite Menu Links</title>
<style>
    ul.menu {
        list-style-type: none;
    }
    ul.menu li {
        padding: 5px;
        font-size: 16px;
        font-family: "Trebuchet MS", Arial, sans-serif;
    }
    ul.menu li a {
        height: 50px;
        line-height: 50px;
        display: inline-block;
        padding-left: 60px; /* To sift text off the background-image */
        color: #3E789F;
        background: url("/examples/images/mySprite.png") no-repeat; /* As all link share the same background-image */
    }
    ul.menu li.firefox a {
        background-position: 0 0;
    }
    ul.menu li.chrome a {
        background-position: 0 -100px;
    }
    ul.menu li.ie a {
        background-position: 0 -200px;
    }
    ul.menu li.safari a {
        background-position: 0 -300px;
    }
    ul.menu li.opera a {
        background-position: 0 -400px;
    }
    ul.menu li.firefox a:hover {
        background-position: 0 -50px;
    }
    ul.menu li.chrome a:hover {
        background-position: 0 -150px;
    }
    ul.menu li.ie a:hover {
        background-position: 0 -250px;
    }
    ul.menu li.safari a:hover {
        background-position: 0 -350px;
    }
    ul.menu li.opera a:hover {
        background-position: 0 -450px;
    }
</style>
</head>
<body>
	<ul class="menu">
        <li class="firefox"><a href="#">Firefox</a></li>
        <li class="chrome"><a href="#">Chrome</a></li>
        <li class="ie"><a href="#">Explorer</a></li>
        <li class="opera"><a href="#">Opera</a></li>
        <li class="safari"><a href="#">Safari</a></li>
    </ul>
</body>
</html>

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Example of Setting Hover State for Sprite Menu Links</title>
<style>
    ul.menu {
        list-style-type: none;
    }
    ul.menu li {
        padding: 5px;
        font-size: 16px;
        font-family: "Trebuchet MS", Arial, sans-serif;
    }
    ul.menu li a {
        height: 50px;
        line-height: 50px;
        display: inline-block;
        padding-left: 60px; /* To sift text off the background-image */
        color: #3E789F;
        background: url("/examples/images/mySprite.png") no-repeat; /* As all link share the same background-image */
    }
    ul.menu li.firefox a {
        background-position: 0 0;
    }
    ul.menu li.chrome a {
        background-position: 0 -100px;
    }
    ul.menu li.ie a {
        background-position: 0 -200px;
    }
    ul.menu li.safari a {
        background-position: 0 -300px;
    }
    ul.menu li.opera a {
        background-position: 0 -400px;
    }
    ul.menu li.firefox a:hover {
        background-position: 0 -50px;
    }
    ul.menu li.chrome a:hover {
        background-position: 0 -150px;