网站左右两边浮动广告 (又一贴)

<script type="text/javascript" src="left_right.js"></script>
-------------left_right.js-------------------
 var delta=0.15
 var collection;
 var closeB=false;
 function floaters() {
  this.items = [];
  this.addItem = function(id,x,y,content)
      {
     document.write('<DIV id='+id+' style="Z-INDEX: 10; 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 || closeB)
   {
    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 = '';
   }
  } 
    function closeBanner()
  {
   closeB=true;
   return;
  }
  
 var theFloaters  = new floaters();
 //
 theFloaters.addItem('followDiv1','document.body.clientWidth-110',140,'<EMBED src=cec-image/newyear.swf quality=high  WIDTH=91 HEIGHT=258 TYPE=application/x-shockwave-flash></EMBED><br><img src=cec-image/close.jpg onClick="closeBanner();">');
 theFloaters.addItem('followDiv2',12,140,'<EMBED src=cec-image/newyear.swf quality=high  WIDTH=91 HEIGHT=258 TYPE=application/x-shockwave-flash></EMBED><br><img src=cec-image/close.jpg onClick="closeBanner();">');
 //theFloaters.addItem('followDiv1','document.body.clientWidth-110',16,'<a href="http://www.021online.com" target="_blank"><img src=cec-image/021online_right.gif width=91 height=258 border=0></a><br><br><img src=cec-image/close.jpg onClick="closeBanner();">');
 //theFloaters.addItem('followDiv2',12,16,'<a href="http://www.021online.com" target="_blank"><img src=cec-image/021online_left.gif width=91 height=258 border=0></a><br><br><img src=cec-image/close.jpg onClick="closeBanner();">');
 theFloaters.play();

本文地址：http://com.8s8s.com/it/it23939.htm