function display(){
   document.getElementById("boxdl").style.display="block"; 
   document.getElementById("out").style.border='#ccc 1px solid';
   document.getElementById("out").style.borderBottom='none';
  }
  function disappear(){
   document.getElementById("boxdl").style.display="none"; 
   document.getElementById("out").style.border='#fff 1px solid';

  }