function NvScroll()
{
	this.version = "0.2";
	this.name = "NvScroll";
	this.item = new Array();
	this.itemcount = 0;
	this.currentspeed = 0;
	this.scrollspeed = 50;
	this.pausedelay = 1000;
	this.pausemouseover = false;
	this.stop = false;
	this.type = 1;
	this.height = 100;
	this.width = 100;
	this.stopHeight=0;
	this.i=0;

	this.add = function ()
	{
		var text = arguments[0];
		this.item[this.itemcount] = text;
		this.itemcount = this.itemcount + 1;
	};

	this.start = function ()
	{
		if ( this.itemcount == 1 ) {
			this.add(this.item[0]);
		}

		this.display();
		this.currentspeed = this.scrollspeed;
		this.stop = true;
		setTimeout(this.name+'.scroll()',this.currentspeed);
		window.setTimeout(this.name+".stop = false", this.pausedelay);
	};

	this.display = function ()
	{
		document.write('<div id="'+this.name+'" style="height:'+this.height+'; width:'+this.width+'; position:relative; overflow:hidden; " OnMouseOver="'+this.name+'.onmouseover(); " OnMouseOut="'+this.name+'.onmouseout(); ">');
		for(var i = 0; i < this.itemcount; i++)
		{
			if ( this.type == 1)
			{
				document.write('<div id="'+this.name+'item'+i+'"style="left:0px; width:'+this.width+'; position:absolute; top:'+(this.height*i)+'px; ">');
				document.write(this.item[i]);
				document.write('</div>');
			}
			else if ( this.type == 2 )
			{
				document.write('<div id="'+this.name+'item'+i+'"style="left:'+(this.width*i)+'px; width:'+this.width+'; position:absolute; top:0px; ">');
				document.write(this.item[i]);
				document.write('</div>');
			}
		}
		document.write('</div>');
	};

	this.scroll = function ()
	{
		if ( this.pause == true )
		{
			window.setTimeout(this.name+".scroll()",this.pausedelay);
			this.pause = false;
		}
		else
		{
			this.currentspeed = this.scrollspeed;
			if ( !this.stop )
			{
				for (i = 0; i < this.itemcount; i++)
				{
					obj = document.getElementById(this.name+'item'+i).style;
					if ( this.type == 1 )
					{
						obj.top = parseInt(obj.top) - 1;
						if ( parseInt(obj.top) <= this.height * (-1) ) obj.top = this.height * (this.itemcount-1);
						if ( parseInt(obj.top) == 0 ) this.currentspeed = this.pausedelay;
					}
					else if ( this.type == 2 )
					{
						obj.left = parseInt(obj.left) - 1;
						if ( parseInt(obj.left) <= this.width * (-1) ) obj.left = this.width * (this.itemcount-1);
						if ( parseInt(obj.left) == 0 ) this.currentspeed = this.pausedelay;
					}
				}
			}

			window.setTimeout(this.name+".scroll()",this.currentspeed);
		}
	};

	this.onmouseover = function ()
	{
		if ( this.pausemouseover )
		{
			this.stop = true;
		}
	};

	this.onmouseout = function ()
	{
		if ( this.pausemouseover )
		{
			this.stop = false;
		}
	};

	this.next = function()
	{
		this.stop = true;
		for (i = 0; i < this.itemcount; i++)
		{
			obj = document.getElementById(this.name+'item'+i).style;
			if ( parseInt(obj.left) < 1 )
			{
				width = this.width + parseInt(obj.left);
				break;
			}
		}

		for (i = 0; i < this.itemcount; i++)
		{
			obj = document.getElementById(this.name+'item'+i).style;
			if ( parseInt(obj.left) < 1 )
			{
				obj.left = this.width * (this.itemcount-1);
			}
			else
			{
				obj.left = parseInt(obj.left) - width;
			}
		}

		this.stop = false;
		this.pause = true;
	}

	this.prev = function()
	{
		this.stop = true;
		for (i = 0; i < this.itemcount; i++)
		{
			obj = document.getElementById(this.name+'item'+i).style;
			if ( parseInt(obj.left) < 1 )
			{
				width = parseInt(obj.left) * (-1);
				break;
			}
		}
		if ( width == 0 )
		{
			total_width = this.width * (this.itemcount-1);
			for (i = 0; i < this.itemcount; i++)
			{
				obj = document.getElementById(this.name+'item'+i).style;
				if ( parseInt(obj.left) + 1 > total_width )
				{
					obj.left = 0;
				}
				else
				{
					obj.left = parseInt(obj.left) + this.width;
				}
			}
		}
		else
		{
			for (i = 0; i < this.itemcount; i++)
			{
				obj = document.getElementById(this.name+'item'+i).style;
				if ( parseInt(obj.left) < 1 )
				{
					obj.left = 0;
				}
				else
				{
					obj.left = parseInt(obj.left) + width;
				}
			}
		}

		this.stop = false;
		this.pause = true;
	}
}