页面两侧对联广告代码效果

在1024*768分辨率下正常显示,在800*600的分辨率下可以自动隐藏,以免遮住页面影响访问者浏览内容,下面文本框中就是实现效果所需代码:
  
var delta=0.015
  var collection;
  function floaters() {
    this.items  = [];
    this.addItem  = function(id,x,y,content)
         {
          document.write('<DIV id='+id+' style="Z-INDEX: 0; POSITION: absolute; width:80px; height:60px;left:'+(typeof(x)=='string'?eval(x):x)+';top:'+(typeof(y)=='string'?eval(y):y)+'">'+content+'</DIV>');
          
          var newItem        = {};
          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()',10);
         }
    }
    function play()
    {
      if(screen.width<=800)
      {
        for(var i=0;i<collection.length;i++)
        {
          collection[i].object.style.display  = 'none';
        }
        return;
      }
      for(var i=0;i<collection.length;i++)
      {
        var followObj    = collection[i].object;
        var followObj_x    = (typeof(collection[i].x)=='string'?eval(collection[i].x):collection[i].x);
        var followObj_y    = (typeof(collection[i].y)=='string'?eval(collection[i].y):collection[i].y);

        if(followObj.offsetLeft!=(document.body.scrollLeft+followObj_x)) {
          var dx=(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)) {
          var dy=(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  = '';
      }
    }  
    
  var theFloaters    = new floaters();
  theFloaters.addItem('followDiv1','document.body.clientWidth-100',0,'</a><br><a href=广告链接地址 target=_blank><img src=广告图片地址 width=100 height=400 border=0></a>');
  theFloaters.addItem('followDiv2',0,0,'<br><a href=广告链接地址 target=_blank><img src=广告图片地址 width=100 height=400 border=0></a>');
  theFloaters.play();
 

把上面的代码另存为一个JS文件,然后在想实现此效果的页面用<script type="text/javascript" language="javascript1.2" src="*.js"></SCRIPT>调用即可,*代表你另存的文件名!注意修改广告图片地址和连接地址!

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