左右两侧浮动广告代码(可关闭)

ad.js:
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vardelta=0.45;
varcollection;
varcloseB=false;
functionfloaters(){
 this.items=[];
 this.addItem=function(id,x,y,content)
   {
  document.write(''+content+'

');
  
  varnewItem  ={};
  newItem.object =document.getElementById(id);
  newItem.x  =x;
  newItem.y  =y;

  this.items[this.items.length] =newItem;
   }
 this.play=function()
   {
  collection  =this.items
  setInterval('play()',30);
   }
 }
 functionplay()
 {
 if(screen.width<=800||closeB)
 {
  for(vari=0;i  {
  collection[i].object.style.display='none';
  }
  return;
 }
 for(vari=0;i {
  varfollowObj =collection[i].object;
  varfollowObj_x =(typeof(collection[i].x)=='string'?eval(collection[i].x):collection[i].x);
  varfollowObj_y =(typeof(collection[i].y)=='string'?eval(collection[i].y):collection[i].y);

  if(followObj.offsetLeft!=(document.body.scrollLeft+followObj_x)){
  vardx=(document.body.scrollLeft+followObj_x-followObj.offsetLeft)*delta;
  dx=(dx>0?1:-1)*Math.ceil(Math.abs(dx));
  followObj.style.left=followObj.offsetLeft+dx;
  }

  if(followObj.offsetTop!=(document.body.scrollTop+followObj_y)){
  vardy=(document.body.scrollTop+followObj_y-followObj.offsetTop)*delta;
  dy=(dy>0?1:-1)*Math.ceil(Math.abs(dy));
  followObj.style.top=followObj.offsetTop+dy;
  }
  followObj.style.display='';
 }
 }
 functioncloseBanner()
 {
 closeB=true;
 return;
 }

vartheFloaters =newfloaters();
//
theFloaters.addItem('followDiv1','document.body.clientWidth-100',100,'

');
theFloaters.addItem('followDiv2',0,100,'

');
theFloaters.play();
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Head里面添加: