<html>
<head>
<style>
.black {
font-size: 10pt;
color: black;
}
.red {
font-size: 15pt;
color: red;
}
.yellow {
font-size: 20pt;
color: yellow;
}
</style>
</head>
<body>
<div class="black" onMouseOver="this.className='red';" onMouseDown="this.className='yellow';" onMouseOut="this.className='black';">
变化的文字
</div>
</body>
</html>
2005-01-20 18:28