var intervalId = null;
function openbanner(id,nStayTime){
	intervalId = null;
	slideAd(id,nStayTime);
	document.getElementById("Aline").innerHTML="<font color=#CCCCCC>旅游专线</font>";
	}
function slideAd(id,nStayTime,sState,nMaxHth,nMinHth){ 
  this.stayTime=nStayTime*1000 || 3000; 
  this.maxHeigth=nMaxHth || 386; 
  this.minHeigth=nMinHth || 5; 
  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("Aline").innerHTML="<a href='#top' onClick=openbanner('MyMoveAd',2)><font color='#D90000'>旅游专线</font></a>";
    } 
  } 
  function closeBox(){ 
   slideAd(id,this.stayTime,"up",nMaxHth,nMinHth); 
  } 
  intervalId = window.setInterval(openBox,10); 
}