var delta=0.8;//多个广告之间的偏移量
	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()',30);
		}
	}
	function play()
	{
		var debugmsg='';
		if(screen.width<=800 || closeB)	//晕，屏幕分辨率小于800就不显示了，那投放这些广告的商家岂不吃亏了:)
		{
			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);
//			debugmsg+='followObj_x = ' + followObj_x + ' ; ';
//			debugmsg+='followObj_y = ' + followObj_y + ' ; ';

			if(followObj.offsetLeft != (document.body.scrollLeft + followObj_x)) {
				var dx=(document.body.scrollLeft + followObj_x - followObj.offsetLeft)*delta;
//				debugmsg+='document.body.scrollLeft = ' + document.body.scrollLeft + ' ; ';
//				debugmsg+='followObj.offsetLeft = ' + followObj.offsetLeft + ' ; ';
//				debugmsg+='(dx = document.body.scrollLeft + followObj_x - followObj.offsetLeft) * 0.8 = ' + dx + ' ; ';
				dx=(dx>0?1:-1)*Math.ceil(Math.abs(dx));
				followObj.style.left=followObj.offsetLeft + dx;
//				debugmsg+='Math.ceil(Math.abs(dx)) = ' + Math.ceil(Math.abs(dx)) + ' ; ';
//				alert(debugmsg);
			}

			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.play();