3-5中如何通过鼠标悬停 来实现隐藏和现实内容 是用hover么 要该怎么结合使用 谢谢啦！
通过更改display标签以及onmuose和onmouseout事件实现，具体操作：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
<title>test13</title>
<script type="text/javascript">
window.onload = function(){
var a = document.getElementById("hover");
var t = document.getElementById("text");
a.onmouseover = function(){
t.style.display = "none";
}
a.onmouseout = function(){
t.style.display = "block";
}
}
</script>
</head>
<body>
<a href="#" id="hover">hover</a>
<p id="text" style="display: block">隐藏这段文字</p>
</body>
</html>