js左右弹性滚动对联广告代码分享

点评：这个对联广告与其它的有所区别，这个是页面加载时先没看到广告，然后从左边快速飞进来的两个对联广告哦，下面我们一起来看看对联广告效果代码！

代码如下:

<p>

<meta content="text/html; charset=gb2312" http-equiv="Content-Type" /><style type="text/css">

.shuoming {margin-top:20px; border:1px solid #ccc; padding-bottom:10px; width:600px; margin:0 auto;}

.shuoming dt {height:30px; line-height:30px; font-weight:bold; text-indent:10px;}

.shuoming dd {line-height:20px; padding:5px 20px;}</style></p>

<script language=JavaScript >

 var delta=0.08

 var collection;

 function floaters() {

  this.items = [];

  this.addItem = function(id,x,y,content)

      {

     document.write('<p 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+'</p>');

     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()

  {

   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.documentElement.scrollLeft+followObj_x)) {

     var dx=(document.documentElement.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.documentElement.scrollTop+followObj_y)) {

     var dy=(document.documentElement.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();

 //右面

 theFloaters.addItem('followp1','document.documentElement.clientWidth-106',80,'<img src=http://pic.jb51.net/sudu.gif id=ad />');

 //左面

 theFloaters.addItem('followp2',6,80,'<img src=http://pic.jb51.net/sudu.gif id=ad />');

 theFloaters.play();

//图片格式调用方法

//<a href=http://www.jb51.net.net/ target=_blank><img  src=http://pic.jb51.net/sudu.gif border=0></a>

</script>

<table border="0" cellspacing="0" cellpadding="0" width="778" bgcolor="#f4f4f4" align="center" height="1500">

    <tbody>

        <tr>

            <td valign="top" align="center"><br />

            <dl class="shuoming"></dl></td>

        </tr>

    </tbody>

</table>