<html>
<head>
<script type="text/javascript">
function nameon()
{
document.getElementById('h2text').innerHTML="欢迎！"
}
function nameout()
{
document.getElementById('h2text').innerHTML="今天过得怎么样？"
}
</script>
</head>
<body>
<h2 id="h2text" onmouseout="nameout()"
onmouseover="nameon()">
请把鼠标移动到文本上！</h2>
</body>
</html>