function MsMarquee()
{
	this.ID = document.getElementById(arguments[0]);
	if(!this.ID)//如果ID不存在就给出消息框ID不存在
	{
		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;
	}
//参数初始化全部为0（鼠标悬停，起始宽高，间歇间隔时间）
	this.Direction = this.Width = this.Height = this.DelayTime = this.WaitTime = this.CTL = this.StartID = this.Stop = this.MouseOver = 0;
	this.Step = 1;
	this.Timer = 30;
	this.DirectionArray = {"top":0 , "up":0 , "bottom":1 , "down":1 , "left":2 , "right":3};
	if(typeof arguments[1] == "number" || typeof arguments[1] == "string")this.Direction = arguments[1];//设置滚动方向
	if(typeof arguments[2] == "number")this.Step = arguments[2];//设置步长（滚动的速度，数字越大越快）
	if(typeof arguments[3] == "number")this.Width = arguments[3];//窗体的宽
	if(typeof arguments[4] == "number")this.Height = arguments[4];//窗体的高
	if(typeof arguments[5] == "number")this.Timer = arguments[5];//定时器，每隔多久触发一次检查（数字越小越快）
	if(typeof arguments[6] == "number")this.DelayTime = arguments[6];//间歇默认时间（停多长）
	if(typeof arguments[7] == "number")this.WaitTime = arguments[7];//开始时等待时间（第一频等多久。不过设置似乎没有什么用。）
	if(typeof arguments[8] == "number")this.ScrollStep = arguments[8];//一次滚动多少（比如你一个对象整体高度（图高+文字高））
	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();//开始滚动
}

MsMarquee.prototype.Start = function()
{
	if(this.ID == -1)return;//ID不存在就返回，不再执行
	if(this.WaitTime < 800)this.WaitTime = 800;//等待时间小于800就以800为默认
	if(this.Timer < 20)this.Timer = 20;//定事器数字小于20时以20为默认
	if(this.Width == 0)this.Width = parseInt(this.ID.style.width);//设置宽
	if(this.Height == 0)this.Height = parseInt(this.ID.style.height);//设置高
	if(typeof this.Direction == "string")this.Direction = this.DirectionArray[this.Direction.toString().toLowerCase()];//设置滚动方向
	this.HalfWidth = Math.round(this.Width / 2);//当前宽的一半
	this.HalfHeight = Math.round(this.Height / 2);//当前高的一半
	this.BakStep = this.Step;//备份步长
	this.ID.style.width = this.Width + "px";//设置当前对象的宽
	this.ID.style.height = this.Height + "px";//设置当前对象的高
	if(typeof this.ScrollStep != "number")this.ScrollStep = this.Direction > 1 ? this.Width : this.Height;//当前步长值大于1时以高为翻动高度否则以宽为反动高度

	//设置2个字符串对象。其中（MSCLASS_TEMP_HTML）会在后面被替换成我们自己定义了样式的HTML代码
	var templateLeft = "<table cellspacing='0' cellpadding='0' style='border-collapse:collapse;display:inline;'><tr><td noWrap=true style='white-space: nowrap;word-break:keep-all;'>MSCLASS_TEMP_HTML</td><td noWrap=true style='white-space: nowrap;word-break:keep-all;'>MSCLASS_TEMP_HTML</td></tr></table>";
	var templateTop = "<table cellspacing='0' cellpadding='0' style='border-collapse:collapse;'><tr><td>MSCLASS_TEMP_HTML</td></tr><tr><td>MSCLASS_TEMP_HTML</td></tr></table>";
	var msobj = this;
	msobj.tempHTML = msobj.ID.innerHTML;//设置文本对象（用户定义的HTML代码）
	if(msobj.Direction <= 1)//判断滚动方向（上，下滚）加载用户定义的HTML
	{
		msobj.ID.innerHTML = templateTop.replace(/MSCLASS_TEMP_HTML/g,msobj.ID.innerHTML);
	}
	else
	{
		//左右滚动时是无间隙滚动还是间歇式滚动
		if(msobj.ScrollStep == 0 && msobj.DelayTime == 0)
		{
			msobj.ID.innerHTML += msobj.ID.innerHTML;
		}
		else
		{
			msobj.ID.innerHTML = templateLeft.replace(/MSCLASS_TEMP_HTML/g,msobj.ID.innerHTML);
		}
	}
	var timer = this.Timer;//定时器
	var delaytime = this.DelayTime;
	var waittime = this.WaitTime;
	msobj.StartID = function(){msobj.Scroll()}//开始循环滚动
	msobj.Continue = function()//鼠标移动到图层中滚动停止（移出继续滚）
				{					
					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()//滚动暂停
			{
				msobj.Stop = 1;
				clearInterval(msobj.TimerID);
				setTimeout(msobj.Continue,delaytime);
			}

	msobj.Begin = function()//滚动开始
		{
			//此处做的是外部的重复工作，这么做的目的不名
			msobj.ClientScroll = msobj.Direction > 1 ? msobj.ID.scrollWidth / 2 : msobj.ID.scrollHeight / 2;
			if((msobj.Direction <= 1 && msobj.ClientScroll <= msobj.Height + msobj.Step) || (msobj.Direction > 1 && msobj.ClientScroll <= msobj.Width + msobj.Step))			{
				msobj.ID.innerHTML = msobj.tempHTML;
				delete(msobj.tempHTML);
				return;
			}
			delete(msobj.tempHTML);//删除读取到的临时文本
			msobj.TimerID = setInterval(msobj.StartID,timer);//设置间隔时间
			if(msobj.ScrollStep < 0)return;
			msobj.ID.onmousemove = function(event)//鼠标移动事件
						{
							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()//鼠标事件移出
						{
							if(msobj.ScrollStep == 0)return;
							msobj.MouseOver = 1;
							clearInterval(msobj.TimerID);
						}
			msobj.ID.onmouseout = function()//鼠标移入
						{
							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);
}

MsMarquee.prototype.Scroll = function()//滚动原型（判断是哪种滚动，并判断是否到达滚动条件设置是否滚动）
{
	switch(this.Direction)
	{
		case 0://向上
			this.CTL += this.Step;
			if(this.CTL >= this.ScrollStep && this.DelayTime > 0)
			{
				this.ID.scrollTop += this.ScrollStep + this.Step - this.CTL;//满足滚动。设置为初始值并滚动一次，后同。
				this.Pause();
				return;
			}
			else
			{
				if(this.ID.scrollTop >= this.ClientScroll)
				{
					this.ID.scrollTop -= this.ClientScroll;//不满足滚动条件，值递减一次。
				}
				this.ID.scrollTop += this.Step;
			}
		break;

		case 1://向下
			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://左
			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://右
			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;
	}
}