function display(boxname){
document.getelementbyid("qiyeshujubox").style.display="none"; 
document.getelementbyid("peixunbox").style.display="none"; 
document.getelementbyid("jiankangbox").style.display="none"; 
document.getelementbyid("shangjibox").style.display="none"; 
document.getelementbyid("qilianqikanbox").style.display="none"; 
document.getelementbyid("wangzhandaohangbox").style.display="none"; 
document.getelementbyid(boxname).style.display="block"; 
  }
  function disappear(boxname){
document.getelementbyid(boxname).style.display="none"; 
  }