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.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];
	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 templateLeft = "MSCLASS_TEMP_HTML MSCLASS_TEMP_HTML";
	var templateTop = "MSCLASS_TEMP_HTML MSCLASS_TEMP_HTML";
	var msobj = this;
	msobj.tempHTML = msobj.ID.innerHTML;
	if(msobj.Direction <= 1)
	{
	  msobj.ID.innerHTML = templateTop.replace(/MSCLASS_TEMP_HTML/g,msobj.ID.innerHTML);
	}
	else
	{
	  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;
	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 / 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);
	  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;
	}
}