// JavaScript Document
function RectChange(id,cur,len,canshu) {
  for(i=1;i<=len;++i)
  {
	  document.getElementById(id + "A" +i).style.display='none';
	   document.getElementById(id + "B" +i).className='';
  }
  document.getElementById(id + "A" +cur).style.display='';
  //rxA1;
   document.getElementById(id + "B" +cur).className=canshu;
} 

    function doZoom(size)
    {
	    document.getElementById('zoom').style.fontSize=size+'px'
    }


var intervalId = null;
function slideAd(id,nStayTime,sState,nMaxHth,nMinHth){
  this.stayTime=nStayTime*1000 || 5000;
  this.maxHeigth=nMaxHth || 500;
  this.minHeigth=nMinHth || 1;
  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 + 7) : (h - 7))+"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);
}