//常数定义     
  self.onError=null;           
  currentX   =   currentY   =   0;           
  whichIt   =   null;           
  lastScrollX   =   0;   //最后离左边距离的负值   
  lastScrollY   =0;     //最后离顶部的高度的负值   
        
  //----------------------start   fun秒执行一次         
  function   heartBeat(id1,id2)   {           
  diffY   =   document.body.scrollTop;   
  diffX   =   document.body.scrollLeft;     
    
  if(diffY   !=   lastScrollY)   {           
  percent   =   .1   *   (diffY   -   lastScrollY);           
  if(percent   >   0)   percent   =   Math.ceil(percent);           
  else   percent   =   Math.floor(percent);           
  id1.style.pixelTop   +=   percent;   
  id2.style.pixelTop   +=   percent;         
  lastScrollY   =   lastScrollY   +   percent;           
  }           
    
  if(diffX   !=   lastScrollX)   {           
  percent   =   .1   *   (diffX   -   lastScrollX);           
  if(percent   >   0)   percent   =   Math.ceil(percent);           
  else   percent   =   Math.floor(percent);           
  id1.style.pixelTop   +=   percent;   
  id2.style.pixelTop   +=   percent;               
  lastScrollX   =   lastScrollX   +   percent;           
  }           
  }           
  //-----------------------end   fun   
  scr=screen.width   
  left_1=(scr>800)?10:145   
  right_1=(scr>800)?880:580   
    
  //左侧图片   
  document.write("<DIV   id=f1   style='left:   "+left_1+"px;   top:   215px;   POSITION:   absolute;'><a   href=news.asp   target=_blank><img   src=float.gif   border=0   width=100  height=300></a></div>")   
    
  //右侧图片   
  //document.write("<DIV   id=f2   style='left:   "+right_1+"px;   top:   215px;   POSITION:   absolute;'><a   href=http://www.cney.net/art_data.asp?id=78   target=_blank><img   src=ad/yydb.gif   border=0   width=150   height=47></a></div>")   
    
  //action   =   window.setInterval("heartBeat(f1,f2)",50);           
    
 // 然后在你想要放的页面上加上这段代码就搞定了   
  //<script   src="drop.js"></script>