通过与跟JS配合使用实现需求
<head>
<title>Chat Room</title>
<script type="text/javascript" src="js/jquery-1.8.0.min.js"></script>
<script type="text/javascript" src="js/chat.js"></script>
<link rel="stylesheet" href="css/chat.css"/>
<Script Language="JavaScript">
function modify()
{
document.chatform.action="chat";
document.chatform.submit();
}
function exit()
{
document.chatform.action="outlogin.jsp";
document.chatform.submit();
}
</Script>
</head>
<body>
<form name="chatform" action="chat" method="post">
<table cellpadding="0" cellspacing="0">
<tr>
<td class="pl">
<input id="Button1" type="button" value="Send" class="btn" onClick="modify()"/>
<input id="Button2" type="button" value="Exit" class="btn" onClick="exit()"/>
<input id="Button4" style="display:none" type="button" value="Hide" class="btn"/>
</td>
</tr>
</table>
</form>
</body>
扩展：
提交form的时候，附带默认参数。
需要在表单里添加一个隐藏的input
<input type="hidden" name="args" value="888">
学习博客：
https://blog.csdn.net/LF_Software_Studio/article/details/7370007