//初始化 
var def="1"; 
function mover(object){ 
//主菜单 
var mm=document.getElementById("m_"+object); 
mm.className="m_li_a"; 
//初始主菜单先隐藏效果 
if(def!=0){ 
var mdef=document.getElementById("m_"+def); 
mdef.className="m_li"; 
} 
//子菜单 
var ss=document.getElementById("s_"+object); 
ss.style.display="block"; 
//初始子菜单先隐藏效果 
if(def!=0){ 
var sdef=document.getElementById("s_"+def); 
sdef.style.display="none"; 
} 
} 
function mout(object){ 
//主菜单 
var mm=document.getElementById("m_"+object); 
mm.className="m_li"; 
//初始主菜单还原效果 
if(def!=0){ 
var mdef=document.getElementById("m_"+def); 
mdef.className="m_li_a"; 
} 
//子菜单 
var ss=document.getElementById("s_"+object); 
ss.style.display="none"; 
//初始子菜单还原效果 
if(def!=0){ 
var sdef=document.getElementById("s_"+def); 
sdef.style.display="block"; 
} 
}