function Marquee()
{
	this.ID = document.getElementById(arguments[0]);
	if(!this.ID)
	{
		alert("您要设置的\"" + arguments[0] + "\"初始化错误\r\n请检查标签ID设置是否正确!");
		this.ID = -1;
		return;
	}
	this.Direction = this.Width = this.Height = this.DelayTime = this.WaitTime = this.Correct = this.CTL = this.StartID = this.Stop = this.MouseOver = 0;
	this.Step = 1;
	this.Timer = 30;
	this.DirectionArray = {"top":0 , "bottom":1 , "left":2 , "right":3};
	if(typeof arguments[1] == "number" || typeof arguments[1] == "string")this.Direction = arguments[1];
	if(typeof arguments[2] == "number")this.Step = arguments[2];
	if(typeof arguments[3] == "number")this.Width = arguments[3];
	if(typeof arguments[4] == "number")this.Height = arguments[4];
	if(typeof arguments[5] == "number")this.Timer = arguments[5];
	if(typeof arguments[6] == "number")this.DelayTime = arguments[6];
	if(typeof arguments[7] == "number")this.WaitTime = arguments[7];
	if(typeof arguments[8] == "number")this.ScrollStep = arguments[8]
	this.ID.style.overflow = this.ID.style.overflowX = this.ID.style.overflowY = "hidden";
	this.ID.noWrap = true;
	this.IsNotOpera = (navigator.userAgent.toLowerCase().indexOf("opera") == -1);
	if(arguments.length >= 7)this.Start();
}
Marquee.prototype.Start = function()
{
	if(this.ID == -1)return;
	if(this.WaitTime < 800)this.WaitTime = 800;
	if(this.Timer < 20)this.Timer = 20;
	if(this.Width == 0)this.Width = parseInt(this.ID.style.width);
	if(this.Height == 0)this.Height = parseInt(this.ID.style.height);
	if(typeof this.Direction == "string")this.Direction = this.DirectionArray[this.Direction.toString().toLowerCase()];
	this.HalfWidth = Math.round(this.Width / 2);
	this.HalfHeight = Math.round(this.Height / 2);
	this.BakStep = this.Step;
	this.ID.style.width = this.Width + "px";
	this.ID.style.height = this.Height + "px";
	if(typeof this.ScrollStep != "number")this.ScrollStep = this.Direction > 1 ? this.Width : this.Height;
	var msobj = this;
	var timer = this.Timer;
	var delaytime = this.DelayTime;
	var waittime = this.WaitTime;
	msobj.StartID = function(){msobj.Scroll()}
	msobj.Continue = function()
	{
		if(msobj.MouseOver == 1)
		{
			setTimeout(msobj.Continue,delaytime);
		}
		else
		{	clearInterval(msobj.TimerID);
			msobj.CTL = msobj.Stop = 0;
			msobj.TimerID = setInterval(msobj.StartID,timer);
		}
	}
	msobj.Pause = function()
	{
		msobj.Stop = 1;
		clearInterval(msobj.TimerID);
		setTimeout(msobj.Continue,delaytime);
	}
	msobj.Begin = function()
	{
		msobj.ClientScroll = msobj.Direction > 1 ? msobj.ID.scrollWidth : msobj.ID.scrollHeight;
		if((msobj.Direction <= 1 && msobj.ClientScroll <= msobj.Height + msobj.Step) || (msobj.Direction > 1 && msobj.ClientScroll <= msobj.Width + msobj.Step))return;
		msobj.ID.innerHTML += msobj.ID.innerHTML;
		msobj.TimerID = setInterval(msobj.StartID,timer);
		if(msobj.ScrollStep < 0)return;
		msobj.ID.onmousemove = function(event)
			{
				if(msobj.ScrollStep == 0 && msobj.Direction > 1)
				{
					var event = event || window.event;
					if(window.event)
					{
						if(msobj.IsNotOpera)
						{
							msobj.EventLeft = event.srcElement.id == msobj.ID.id ? event.offsetX - msobj.ID.scrollLeft : event.srcElement.offsetLeft - msobj.ID.scrollLeft + event.offsetX;
						}
						else
						{
							msobj.ScrollStep = null;
							return;
						}
					}
					else
					{
						msobj.EventLeft = event.layerX - msobj.ID.scrollLeft;
					}
					msobj.Direction = msobj.EventLeft > msobj.HalfWidth ? 3 : 2;
					msobj.AbsCenter = Math.abs(msobj.HalfWidth - msobj.EventLeft);
					msobj.Step = Math.round(msobj.AbsCenter * (msobj.BakStep*2) / msobj.HalfWidth);
				}
			}
		msobj.ID.onmouseover = function()
			{
				if(msobj.ScrollStep == 0)return;
				msobj.MouseOver = 1;
				clearInterval(msobj.TimerID);
			}
		msobj.ID.onmouseout = function()
			{
				if(msobj.ScrollStep == 0)
				{
					if(msobj.Step == 0)msobj.Step = 1;
					return;
				}
				msobj.MouseOver = 0;
				if(msobj.Stop == 0)
				{
					clearInterval(msobj.TimerID);
					msobj.TimerID = setInterval(msobj.StartID,timer);
				}
			}
	}
	setTimeout(msobj.Begin,waittime);
}
Marquee.prototype.Scroll = function()
{
	switch(this.Direction)
	{
		case 0:
			this.CTL += this.Step;
			if(this.CTL >= this.ScrollStep && this.DelayTime > 0)
			{
				this.ID.scrollTop += this.ScrollStep + this.Step - this.CTL;
				this.Pause();
				return;
			}
			else
			{
				if(this.ID.scrollTop >= this.ClientScroll)
				{
					this.ID.scrollTop -= this.ClientScroll;
				}
				this.ID.scrollTop += this.Step;
			}
		break;
		case 1:
			this.CTL += this.Step;
			if(this.CTL >= this.ScrollStep && this.DelayTime > 0)
			{
				this.ID.scrollTop -= this.ScrollStep + this.Step - this.CTL;
				this.Pause();
				return;
			}
			else
			{
				if(this.ID.scrollTop <= 0)
				{
					this.ID.scrollTop += this.ClientScroll;
				}
				this.ID.scrollTop -= this.Step;
			}
		break;
		case 2:
			this.CTL += this.Step;
			if(this.CTL >= this.ScrollStep && this.DelayTime > 0)
			{
				this.ID.scrollLeft += this.ScrollStep + this.Step - this.CTL;
				this.Pause();
				return;
			}
			else
			{
				if(this.ID.scrollLeft >= this.ClientScroll)
				{
					this.ID.scrollLeft -= this.ClientScroll;
				}
				this.ID.scrollLeft += this.Step;
			}
		break;
		case 3:
			this.CTL += this.Step;
			if(this.CTL >= this.ScrollStep && this.DelayTime > 0)
			{
				this.ID.scrollLeft -= this.ScrollStep + this.Step - this.CTL;
				this.Pause();
				return;
			}
			else
			{
				if(this.ID.scrollLeft <= 0)
				{
					this.ID.scrollLeft += this.ClientScroll;
				}
				this.ID.scrollLeft -= this.Step;
			}
		break;
	}
}