下拉透明菜單四

mpmenu1=new mMenu('網站首頁','/','self','','','','');
mpmenu1.addItem(new mMenuItem(' 使用者註冊','/register.asp','self',false,'使用者註冊',null,'','','',''));
mpmenu1.addItem(new mMenuItem(' 使用者登入','/login.asp','self',false,'使用者登入',null,'','','',''));
mpmenu1.addItem(new mMenuItem(' 使用者退出','/login.asp?action=logout','self',false,'使用者退出',null,'','','',''));
mpmenu1.addItem(new mMenuItem(' 資料修改','/bbs/MYMODIFY.ASP','self',false,'',null,'','','',''));
mpmenu2=new mMenu('軟體下載','/SoftDown/','self','','','','');
mpmenu2.addItem(new mMenuItem(' 系統程式','/softdown/index.asp?CateID=1','self',false,'系統程式',null,'','','',''));
mpmenu2.addItem(new mMenuItem(' 網路工具','/softdown/index.asp?CateID=2','self',false,'網路工具',null,'','','',''));
mpmenu2.addItem(new mMenuItem(' 媒體工具','/softdown/index.asp?CateID=3','self',false,'媒體工具',null,'','','',''));
mpmenu2.addItem(new mMenuItem(' 圖文處理','/softdown/index.asp?CateID=4','self',false,'圖文處理',null,'','','',''));
mpmenu2.addItem(new mMenuItem(' 案頭工具','/softdown/index.asp?CateID=5','self',false,'案頭工具',null,'','','',''));
mpmenu2.addItem(new mMenuItem(' 程式碼','/softdown/index.asp?CateID=6','self',false,'程式碼',null,'','','',''));
mpmenu2.addItem(new mMenuItem(' 遊戲娛樂','/softdown/index.asp?CateID=7','self',false,'遊戲娛樂',null,'','','',''));
mpmenu2.addItem(new mMenuItem(' 其他工具','/softdown/index.asp?CateID=8','self',false,'其他工具',null,'','','',''));
mpmenu2.addItem(new mMenuItem(' 特別欄目','/softdown/index.asp?CateID=9','self',false,'特別欄目',null,'','','',''));
mpmenu2.addItem(new mMenuItem(null,null,null,true));
mpmenu2.addItem(new mMenuItem(' 下載排行','/SoftDown/Index.asp?order=AllHits&updown=desc','self',false,'軟體下載熱門排行榜',null,'','','',''));
mpmenu3=new mMenu('軟體學院','/SoftSchool/','self','','','','');
mpmenu3.addItem(new mMenuItem(' 軟體