var ExitPoll = Class.create();
	ExitPoll.prototype =
	{
		initialize: function( form_id, display_id, amount_in_group )
		{
			this.form = $(form_id);
			if( !this.form ) return false;

			this.display = display_id;

			this.form.onsubmit = function(){ return false; }

			this.radios = this.form.getInputs('radio');
			this.amount_in_group = (amount_in_group) ? parseInt(amount_in_group) : 5;
			this.checked_amount = 0;
			this.msg_select_options = 'Please, check at least one option in every options group.'

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

		send: function()
		{
			for( var i=0; i<this.radios.length; i++ )
				if( this.radios[i].checked )
					++this.checked_amount;

			if( this.checked_amount < (this.radios.length/this.amount_in_group) )
			{
				alert( this.msg_select_options );
				this.checked_amount = 0;
				return false;
			}

			this.parameters = this.form.serialize();
			this.form.disable();
			this.request = new Ajax.Request( 'voting', { method: 'post', parameters: this.parameters, onComplete: this.reply.bind(this) } );
			return false;
		},

		reply: function( request )
		{
			this.display = $(this.display);
			if( !this.display ) return false;
			Element.update( this.display, request.responseText );
			return false;
		}
	}

	var _vote_selected_option = -1;

	function selectThisChoice( radio_id )
	{
		radio_obj = document.getElementById(radio_id);
		_vote_selected_option = radio_obj.value;
		radio_obj.checked = true;
	}

	function sendVoting()
	{
		if( _vote_selected_option < 1 ) { alert( _msg_select_one_option ); return false; }
		else { loadVoting(); }
	}

	function loadVoting()
	{
		var div_obj = $('voting');
		if ( ! div_obj ) { return; }

		if( _vote_selected_option > 0)
		{
			disable('vote_button');
		}
		else if( _vote_selected_option < 1)
		{
			div_obj.innerHTML = _msg_loading ;
		}

		var url = "voting";
		var pars = "selected_option=" + _vote_selected_option ;
		var req = new Ajax.Request(url, { method: "post", parameters: pars, onComplete: function(req){ Element.update( div_obj, req.responseText ); } } );
	}