var intervalId = null; 
  function slideAd(id,nStayTime,sState,nMaxHth,nMinHth){ 
  this.stayTime=nStayTime*1000 || 500 ; 
  this.maxHeigth=nMaxHth || 465; 
  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 +4) : (h - 4))+"px"; 

  if(obj.offsetHeight>this.maxHeigth){ 
    window.clearInterval(intervalId); 
	intervalId=window.setInterval(closeBox,10000); 
    } 
    if (obj.offsetHeight==this.minHeigth && obj.offsetHeight < this.minHeigth){ 
    window.clearInterval(intervalId);
	  obj.style.display="none"; 
    } 
  } 
  function closeBox(){ 
   slideAd(id,this.stayTime,"up",nMaxHth,nMinHth); 
  } 
  // obj.style.display= ((this.stayTime > 1000) ? "none" : ""
  obj.style.display="none"; 
  intervalId = window.setInterval(openBox,10); 
}