var intervalId = null;function slideAd(id,nStayTime,sState,nMaxHth,nMinHth){stayTime=nStayTime*1000 || 3000;maxHeigth=nMaxHth || 90;minHeigth=nMinHth || 1;state=sState || "down" ;var obj = document.getElementById(id);if(intervalId != null)window.clearInterval(intervalId);    function openBox(){        var h = obj.offsetHeight;        obj.style.height = ((state == "down") ? (h + 2) : (h - 2))+"px";        if(obj.offsetHeight>maxHeigth){        window.clearInterval(intervalId);        intervalId=window.setInterval(closeBox,stayTime);        }		if (obj.offsetHeight<minHeigth){		window.clearInterval(intervalId);		obj.style.display="none";		}}	function closeBox(){	slideAd(id,stayTime,"up",nMaxHth,nMinHth);	}intervalId = window.setInterval(openBox,10);}