JSP页面导航条切换。
有木有更加简单的方法实现，原谅我这个初学者写出来这种代码！
JSP Code
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%><!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><title>JSP标签切换</title><link href="css/style.css" rel="stylesheet" type="text/css" /><script type="text/javascript">function turnNextTab(lastId, LastSrc, id, src, nextId, nextSrc) {document.getElementById(id).src = src;document.getElementById(lastId).src = LastSrc;document.getElementById(nextId).src = nextSrc;}</script></head><body><div id=left_b1><div id="gdmenu"></div><div id="gdmenu_on"><img id="img1" src="images/1_1.jpg" width="81" height="28" onclick="javascript:turnNextTab('img2', 'images/2.jpg', 'img1', 'images/1_1.jpg', 'img3', 'images/3.jpg')" /></div><div id="gdmenu_off"><img id="img2" src="images/2.jpg" width="81" height="28" onclick="javascript:turnNextTab('img1', 'images/1.jpg', 'img2', 'images/2_1.jpg', 'img3', 'images/3.jpg')" /></div><div id="gdmenu_off"><img id="img3" src="images/3.jpg" width="81" height="28" onclick="javascript:turnNextTab('img1', 'images/1.jpg', 'img3', 'images/3_1.jpg', 'img2', 'images/2.jpg')" /></div></div></body></html>效果如图：
