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 = "<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;

	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;

	}

}