<%@ page language="java" import="java.util.*"pageEncoding="UTF-8"%>
<%
Stringpath = request.getContextPath();
StringbasePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTDHTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'index4.jsp' startingpage</title>
<meta http-equiv="pragma"content="no-cache">
<meta http-equiv="cache-control"content="no-cache">
<meta http-equiv="expires"content="0">
<meta http-equiv="keywords"content="keyword1,keyword2,keyword3">
<meta http-equiv="description"content="This is my page">
<script type="text/javascript"src="plug/jquery.js"></script>
</head>
<body>
<input type="text"id="content">
<label><input type="button"name="Submit" value="放大" id="bigger"/></label>
<label><input type="button"name="Submit2" value="缩小" id="small"/></label>
<script type="text/javascript">
$(function(){
var content=$("#content");
$("#bigger").click(function(){
if(content.height()<500){
content.height(content.height()+50);
}
else{
alert("已经够高了");
}
});
$("#small").click(function(){
if(content.height()>50){
content.height(content.height()-50);
}
else{
alert("无法在缩小了");
}
});
});
</script>
</body>
</html>
运行效果如下：