document.write('<div id=MyMoveAd style="height:251px;overflow:hidden">');
document.write('<table width="998" border="0" align="center" cellpadding="0" cellspacing="0" bgcolor="#F8F5EC">');
document.write('<tr>');
document.write('<td><img src="http://www.2002th.com/xn.jpg" width="998" height="251"></td>');
document.write('</tr>');
document.write('</table>');
document.write('</div>');
var intervalId = null; 
function slideAd(id,nStayTime,sState,nMaxHth,nMinHth){ 
  this.stayTime=nStayTime*3000 || 500; 
  this.maxHeigth=nMaxHth || 251; 
  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 - 5))+"px"; 
    if(obj.offsetHeight>this.maxHeigth){ 
    window.clearInterval(intervalId); 
    intervalId=window.setInterval(closeBox,this.stayTime); 
    } 
    if (obj.offsetHeight<this.minHeigth){ 
    window.clearInterval(intervalId); 
    obj.style.display="none"; 
    } 
  } 
  function closeBox(){ 
   slideAd(id,this.stayTime,"up",nMaxHth,nMinHth); 
  } 
  intervalId = window.setInterval(openBox,10); 
} 
slideAd('MyMoveAd',2);