1先看一个留言板的小例子
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<fieldset>
<legend>留言板</legend>
<textarea name="text" rows="10" cols="50" style="resize:none;outline:none;" id="text"></textarea>
<input type="button" value="留言" id="addNode" />
<input type="button" value="查询" id="queryNode" />
<input type="button" id="clearBotton" value="收起留言列表"/>
<span>删除第</span>
<input type="text" id="deleTxt" style="width:30px;outline:none"><span>条</span>
<input type="button" id="deleNode" value="删除"/>
<input type="button" value="初始化" id="clearNode"/>
</fildset>
<p id="text2"></p>
</body>
<script type="text/javascript" src="jquery.js"></script>
<script><!DOCTYPE html>
<html lang="
