摘要：
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>菜单伸缩实例</title> <script src="http://code.jquery.com/jquery-1.8.0.min.js"></script> 阅读全文
摘要：
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>菜单伸缩实例</title> <script type="text/javascript" src="http://code.jquery.com/jquery-l 阅读全文