var intervalId = null; 
function slideAd(id,nStayTime,sState,nMaxHth,nMinHth){ 
  this.stayTime=nStayTime*1000 || 3000; 
  this.maxHeigth=nMaxHth || 40; 
  this.minHeigth=nMinHth || 0; 
  this.state=sState || "down" ; 
  var obj = document.getElementById(id); 
  if(intervalId != null)window.clearInterval(intervalId); 
  function openBox(){ 
   var h = obj.offsetHeight; 
   obj.style.height = ((this.state == "down") ? (h + 2) : (h - 2))+"px"; 
    if(obj.offsetHeight>this.maxHeigth){ 
    window.clearInterval(intervalId); 
    intervalId=window.setInterval(closeBox,this.stayTime); 
    } 
    if (obj.offsetHeight<=this.minHeigth){ 
    window.clearInterval(intervalId); 
    document.getElementById("btn_open").style.display="";
    } 
    else
    {
    document.getElementById("btn_open").style.display="none";
    }
  } 
   function closeBox(){ 
   slideAd(id,this.stayTime,"up",nMaxHth,nMinHth); 
  } 
  intervalId = window.setInterval(openBox,10); 
} 


 function closeBox(id,nStayTime,sState,nMaxHth,nMinHth){ 
  this.stayTime=nStayTime*1000 || 3000; 
  this.maxHeigth=nMaxHth || 40; 
  this.minHeigth=nMinHth || 0; 
  this.state=sState || "up" ; 
  var obj = document.getElementById(id); 
  if(intervalId != null)window.clearInterval(intervalId); 
  function cb(){
   var h = obj.offsetHeight; 
   obj.style.height = ((this.state == "up") ? (h - 2) : (h + 2))+"px"; 
    if(obj.offsetHeight<this.minHeigth){ 
    window.clearInterval(intervalId); 
    } 
  } 
     intervalId = window.setInterval(cb,10); 
     document.getElementById("btn_open").style.display="";
}