/* *
* 导航条的切换
 */
function setTab(name,cursel,n){
  for(i=1;i<=n;i++){
  var menu=document.getElementById(name+"_"+i);
  var sub=document.getElementById(name+"_sub_"+i);
  menu.className=i==cursel?"current":"";
  sub.style.display=i==cursel?"block":"none";
  }
}