var siteVote = Class.create();
	siteVote.prototype =
	{
		initialize: function( container_id )
		{
			this.container = $(container_id);
			if( !this.container )
			{
				return false;
			}
			this.init();
			return true;
		},

		init: function()
		{
			this.form = this.container.getElementsByTagName('form')[0];
			if( !this.form )
			{
				return false;
			}
			this.selected_option = -1;
			this.msg_select_option = 'Please, select any option.';

			this.form.onsubmit = function(){ return false; }
			Event.observe(
				this.form,
				'submit',
				this.send.bind(this)
			);

			this.radios = this.form.getInputs('radio');
			this.radios.each( this.observeRadio.bind(this) );
			this.radios.clear();
			return true;
		},

		observeRadio: function(radio)
		{
			radio.checked = false;
			Event.observe(
				radio,
				'click',
				this.selectOption.bind(this,radio)
			);

			Event.observe(
				radio,
				'focus',
				this.selectOption.bind(this,radio)
			);
		},

		selectOption: function( radio )
		{
			if(this.selected_option != radio.value){ this.selected_option = radio.value; }
		},

		send: function()
		{
			if( this.selected_option < 0 )
			{
				alert(this.msg_select_option );
				return false;
			}

			this.parameters = this.form.serialize()+'&ajax=true';
			this.form.disable();
			this.request = new Ajax.Request( this.form.action, { method: this.form.method, parameters: this.parameters, onComplete: this.reply.bind(this) } );
			return false;
		},

		reply: function( request )
		{
			Element.update( this.container, request.responseText );
			this.init();
			return true;
		}
	}