var delta=0.015;
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()',20);
	}
}

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;
}
/***************************************************
'函数名：add_a_Float
'作  用：添加左侧对联广告
'参  数：
'	 image	----广告图片的URL路径
'        width	----广告图片的宽度，取100
'	 height	----广告图片的显示高度
'	 URLink ----广告图片要打开的目标地址链接
'返回值：void
'***************************************************/
function addLeftFloat(image,width,height,URLink)
{
	var i=(120-width)/2;
	theFloaters.addItem('follower1',i,i,'<a onClick="closeBanner();" href='+URLink+' target=_blank><img src='+image+' width='+width+' height='+height+' border=0></a><br><br><img src=Images/close.gif alt="关闭广告" onClick="closeBanner();">');
}
function addRightFloat(image,width,height,URLink)
{
	var i=(120-width)/2;	
	var j=document.body.clientWidth-width-i;
	theFloaters.addItem('follower2',j,i,'<a onClick="closeBanner();" href='+URLink+' target=_blank><img src='+image+' width='+width+' height='+height+' border=0></a><br><br><img src=Images/close.gif alt="关闭广告" onClick="closeBanner();">');
}