function Scroll()
{
    this.num=3;//当前容许多少个
	this.speed=10; //速度(毫秒) 
	this.space = 2; //每次移动(px) 
	this.pageWidth = 132; //翻页宽度 
	this.fill = 0; //整体移位 
	this.moveLock = false; 
	this.moveTimeObj="MoveTimeObj"; 
	this.comp = 0; 
	this.autoPlayObj = "AutoPlayObj"; 
	this.scrollList1;
	this.scrollList2;
	this.leftButton;
	this.rightButton;
	this.scrollAll;	
	
	//构造函数
	this.Init=function()
	{	
	    if(this.GetObj(this.scrollList1).clientWidth> this.num*this.pageWidth)
	    {
		    this.GetObj(this.scrollList2).innerHTML = this.GetObj(this.scrollList1).innerHTML; 		
		    this.GetObj(this.scrollAll).scrollLeft = this.fill; 	
		    //this.AutoPlay();	
		    var self=this;
		    //this.GetObj(this.scrollAll).onmouseout = function(){self.AutoPlay();} 
		    //this.GetObj(this.scrollAll).onmouseover = function(){clearInterval(this.autoPlayObj);} 
		    this.GetObj(this.leftButton).onmouseover=function(){self.GoLeft();}
		    this.GetObj(this.leftButton).onmouseout=function(){self.StopLeft();}
		    this.GetObj(this.rightButton).onmouseover=function(){self.GoRight();}
		    this.GetObj(this.rightButton).onmouseout=function(){self.StopRight();}
		}
	}
	//根据ID取对象
	this.GetObj=function(objName)
	{
		if(document.getElementById)
		{
			return eval('document.getElementById("'+objName+'")');
		}
		else
		{
			return eval('document.all.'+objName);
		}
	}	
	//自动滚动 
	this.AutoPlay=function()
	{ 
		clearInterval(this.autoPlayObj); 
		var self=this;
		this.autoPlayObj = setInterval(function(){self.GoLeft();self.StopLeft();},2000); //间隔时间 
	} 	
	//向右滚动
	this.GoRight = function() {
	    if (this.moveLock) return;
	    clearInterval(this.autoPlayObj);
	    this.moveLock = true;
	    var self = this;
	    this.moveTimeObj = setInterval(function() { self.ScrRight(); }, this.speed);
	} 
	//右滚停止
	this.StopRight=function()
	{ 
		clearInterval(this.moveTimeObj); 
		if(this.GetObj(this.scrollAll).scrollLeft % this.pageWidth - this.fill != 0)
		{ 
			this.comp = this.fill - (this.GetObj(this.scrollAll).scrollLeft % this.pageWidth); 
			this.CompScr(); 
		}
		else
		{ 
			this.moveLock = false; 
		} 
		//this.AutoPlay(); 
	} 
	//右滚动作 
	this.ScrRight=function()
	{ 
		if(this.GetObj(this.scrollAll).scrollLeft <= 0)
		{
			this.GetObj(this.scrollAll).scrollLeft = this.GetObj(this.scrollAll).scrollLeft +this.GetObj(this.scrollList1).offsetWidth
		} 
		this.GetObj(this.scrollAll).scrollLeft -= this.space ; 
	} 
	//向左滚动
	this.GoLeft=function()
	{ 	
		clearInterval(this.moveTimeObj); 
		if(this.moveLock) return; 
		clearInterval(this.autoPlayObj); 
		this.moveLock = true; 
		this.ScrLeft(); 
		var self=this;
		this.moveTimeObj = setInterval(function(){self.ScrLeft();},this.speed); 
	} 
	//左滚停止 
	this.StopLeft=function()
	{ 
		clearInterval(this.moveTimeObj); 
		if(this.GetObj(this.scrollAll).scrollLeft % this.pageWidth - this.fill != 0 )
		{ 
			this.comp = this.pageWidth - this.GetObj(this.scrollAll).scrollLeft % this.pageWidth + this.fill; 
			this.CompScr(); 
		}
		else
		{ 
			this.moveLock = false; 
		} 
		//this.AutoPlay(); 
	} 
	//左滚动作 
	this.ScrLeft=function()
	{ 
		if(this.GetObj(this.scrollAll).scrollLeft >= this.GetObj(this.scrollList1).scrollWidth)
		{
			this.GetObj(this.scrollAll).scrollLeft = this.GetObj(this.scrollAll).scrollLeft - this.GetObj(this.scrollList1).scrollWidth;
		} 
		this.GetObj(this.scrollAll).scrollLeft += this.space ; 
	} 
	
	this.CompScr=function()
	{ 
		var num; 
		if(this.comp == 0)
		{
			this.moveLock = false;
			return;
		} 
		if(this.comp < 0)
		{ //右滚 
			if(this.comp < -this.space)
			{ 
				this.comp += this.space; 
				num = this.space; 
			}
			else
			{ 
				num = -this.comp; 
				this.comp = 0; 
			} 
			this.GetObj(this.scrollAll).scrollLeft -= num; 
			var self=this;
			setTimeout(function(){self.CompScr();},this.speed); 
		}
		else
		{ //左滚 
			if(this.comp > this.space)
			{ 
				this.comp -= this.space; 
				num = this.space; 
			}
			else
			{ 
				num = this.comp; 
				this.comp = 0; 
			} 
			this.GetObj(this.scrollAll).scrollLeft += num; 
			var self=this;
			setTimeout(function(){self.CompScr();},this.speed); 
		} 
	} 
}