//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";
 }
}