使用Javascr ipt编写的源码，功能用于实现动态显示伸缩菜单，用户通过点击不同菜单可进入相应的页面。源码包中有简单的说明文件。-Prepared by the use of Javascr ipt source code, function for the realization of dynamic display scalable menu, the user by clicking the different menus can enter the corresponding pag