<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title></title>
<style type="text/css">
.content
{
border: 1px solid #ccc;
width: 440px;
overflow: hidden;
margin: 10px;
}
</style>
<script type="text/javascript" src="jquery-1.4.2.min.js"></script>
<script type="text/javascript">
$(document).ready(function() {
if ($('#content').height() > 400)
$('#content').height(400);
$('#bigger').toggle(function() {
$('#content').height($('#content').height() + 100);
$('#bigger').html('缩小');
}, function() {
$('#content').height($('#content').height() - 100);
$('#bigger').html('放大');
})
});
</script>
</head>
<body>
<div >放大</span>
</body>
</html>