var listChanger = Class.create();
	listChanger.prototype =
	{
		initialize:function(container_id, class_name)
		{
			this.container = $(container_id);
			this.elements	= this.container.getElementsByClassName(class_name);
			this.changer 	= this.container.getElementsByTagName("select")[0];
			this.options 	= this.changer.getElementsByTagName("option");
			if( !this.elements.length )
			{
				return false;
			}

			this.hidden = 'hc_hidden';
			this.cookie = this.changer.id + '_last_index';
			this.currentIndex = Cookie.get(this.cookie);

			if( this.currentIndex )
			{
				this.currentIndex = parseInt(this.currentIndex);
			}

			if( !(this.currentIndex) || this.currentIndex < 0 || this.currentIndex > (this.options.length-1))
			{
				this.currentIndex = false
			}

			for( var i=0; i < this.options.length; i++ )
			{
				if( this.options[i].selected )
				{
					if( !this.currentIndex)
					{
						this.currentIndex = i;
					}
					else
					{
						this.options[i].selected = false;
						this.elements[i].addClassName(this.hidden);
					}
				}
			}

			if( !this.currentIndex || this.currentIndex == 0 )
			{
				this.currentIndex = 2
			}

			this.options[this.currentIndex].selected = true;
			this.elements[this.currentIndex].removeClassName(this.hidden);

			Event.observe( this.changer, 'change', this.changeOption.bind(this) );
			//Event.observe( this.changer, 'keypress', this.checkKey.bindAsEventListener(this) );

			return true;
		},

		checkKey: function(event)
		{
			this.code = event.keyCode;
			if(this.code == Event.KEY_UP || this.code == Event.KEY_LEFT )
			{
				if( (this.currentIndex - 1 ) > -1 )
				{
					this.changer.selectedIndex = this.currentIndex - 1;
				}
				if( navigator.userAgent.indexOf('MSIE') != -1 && this.code == Event.KEY_UP )
				{
					this.changer.selectedIndex += 1;
				}
				this.changeOption() ;
			}

			if(this.code == Event.KEY_DOWN || this.code == Event.KEY_RIGHT )
			{
				if( (this.currentIndex + 1 ) < this.options.length )
				{
					this.changer.selectedIndex = this.currentIndex + 1;
				}
				if( navigator.userAgent.indexOf('MSIE') != -1 && this.code == Event.KEY_DOWN )
				{
					this.changer.selectedIndex -= 1;
				}
				this.changeOption() ;
			}
			return true;
		},

		changeOption: function()
		{
			if( this.currentIndex == this.changer.selectedIndex )
			{
				return false;
			}

			this.elements[ this.currentIndex ].toggleClassName(this.hidden);
			this.options[this.currentIndex].selected = false;

			this.currentIndex = this.changer.selectedIndex;

			this.elements[ this.currentIndex ].toggleClassName(this.hidden);
			this.options[this.currentIndex].selected = true;

			Cookie.set( this.cookie, this.currentIndex, 30);

			return true;
		}
	}