JavaScript高手请进!

<SCRIPT language=JavaScript> <meta http-equiv="Content-Type" content="text/html; charset=gb2312"> <title>作业</title> <link rel="stylesheet" href="../作业/include/index2.css" type="text/css"> function mmLoadMenus() { if (window.mm_menu_01) return; window.mm_menu_01 = new Menu("root",100,18,"Arial, Helvetica, sans-serif",12,"#000000"/*字体颜色*/,"#FFFFFF"/*选中item的字体颜色*/,"#C2E1FB"/*菜单条的颜色*/,"#003399"/*选中菜单条的颜色*/,"center","middle",3,0,1000,-5,7,true,true,true,0,true,true); mm_menu_01.addMenuItem("校长致词","window.open(✀ExtraSite/Introduction/xiaozhangzhici.asp✀, ✀_self✀);"); mm_menu_01.addMenuItem("学校简介","window.open(✀ExtraSite/Introduction/xueyuanjianjie.asp✀, ✀_self✀);"); mm_menu_01.addMenuItem("现任领导","window.open(✀ExtraSite/Introduction/lirenlingdao.asp✀, ✀_self✀);"); mm_menu_01.addMenuItem("校园风光","window.open(✀ExtraSite/Introduction/xiaoyuanfengguang.asp✀, ✀_self✀);"); mm_menu_01.hideOnMouseOut=true; mm_menu_01.bgColor=✀#003399✀;//右下边框线和横线的颜色 mm_menu_01.menuBorder=1; mm_menu_01.menuLiteBgColor=✀#FFFFFF✀;//左上边框颜色 mm_menu_01.menuBorderBgColor=✀#003399✀;//菜单外边框线的颜色 window.mm_menu_02 = new Menu("root",100,18,"Arial, Helvetica, sans-serif",12,"#000000","#FFFFFF","#C2E1FB","#003399","center","middle",3,0,1000,-5,7,true,true,true,0,true,true); mm_menu_02.addMenuItem("党政管理机构","window.open(✀ExtraSite/ManageDept/dangzhengguanli.asp✀, ✀_self✀);"); mm_menu_02.addMenuItem("群众团体机构","window.open(✀ExtraSite/ManageDept/qunzhongtuanti.asp✀, ✀_self✀);"); mm_menu_02.addMenuItem("直属教辅机构","window.open(✀ExtraSite/ManageDept/zhishujiaofu.asp✀, ✀_self✀);"); mm_menu_02.hideOnMouseOut=true; mm_menu_02.bgColor=✀#003399✀; mm_menu_02.menuBorder=1; mm_menu_02.menuLiteBgColor=✀#FFFFFF✀; mm_menu_02.menuBorderBgColor=✀#003399✀; writeMenus(); } </SCRIPT> 这是一个向上弹出的下拉菜单代码.谁能帮忙看看,把他改成向下弹出的下拉菜单!