function update_page(address_root, postcode)
{
	var ajax = new ajax_file;
	ajax.asynchronous = true;
	ajax.initialize();
	
	ajax.get_content(
		address_root + "modules/postcode/result.php"
		, "postcode=" + encodeURIComponent(postcode)
		, "update_address(my_response)"
	);
}


function update_address(my_response)
{
	var data = JSON.decode(my_response);
	var error_container = $$('#address_finder_error');
	
	var address_building = $$("#input_select_building select");
	var address_building_options = '';
	var address_building_details = '';
	var hidden_premises_inputs = $$('#hidden_premises');
	
	var address_street = $$('#input_text_street input');
	var address_town = $$('#input_text_city input');
	var address_county = $$('#input_text_county input');
	
	var address_building_name_container = $$("#input_text_house_name");
	var address_building_number_container = $$("#input_text_house_number");

	//Clear error message if present
	if(error_container.get('text') != '')
	{
		error_container.set('text', '');
	}
	
	//Show error
	if(data.error)
	{
		error_container.set('text', data.error);
		
		//Set select to default option plus 'other' in case postcode is not in database
		address_building.set('html', '<option value="">- Enter Postcode -</option><option value="other">Other</option>');
		hidden_premises_inputs.set('html', '');
		
		//Clear values
		address_street.set('value', '');
		address_town.set('value', '');
		address_county.set('value', '');
	}
	//Set address
	else if(data)
	{
		address_building_options += '<option value="">- Select Building -</option>';
		
		for(var key in data.premises)
		{
			if($type(key * 1) == "number")
			{
				//Create select options
				address_building_options += '<option value="' + data.premises[key].id + '">';
				if(data.premises[key].organisation != '')
				{
					address_building_options += data.premises[key].organisation + ', ';
				}
				if(data.premises[key].building != '')
				{
					address_building_options += data.premises[key].building + ', ';
				}
				if(data.premises[key].number != '')
				{
					address_building_options += data.premises[key].number + ' ';
				}
				address_building_options += '</option>';
				
				//Create hidden inputs so values can be used on the site
				if(data.premises[key].organisation != '' && data.premises[key].building != '')
				{
					address_building_details += '<input type="hidden" id="premises_' + data.premises[key].id +'_building" value="' + data.premises[key].organisation + ', ' + data.premises[key].building + '" />';
				}
				else if(data.premises[key].organisation != '')
				{
					address_building_details += '<input type="hidden" id="premises_' + data.premises[key].id +'_building" value="' + data.premises[key].organisation + '" />';
				}
				else if(data.premises[key].building != '')
				{
					address_building_details += '<input type="hidden" id="premises_' + data.premises[key].id +'_building" value="' + data.premises[key].building + '" />';
				}
				else
				{
					address_building_details += '<input type="hidden" id="premises_' + data.premises[key].id +'_building" value="" />';
				}
				
				address_building_details += '<input type="hidden" id="premises_' + data.premises[key].id +'_number" value="' + data.premises[key].number + '" />';
			}
		}
		
		//Add in other option in case address is not returned
		address_building_options += '<option value="other">Other</option>';
		
		//Set values
		address_building.set('html', address_building_options);
		hidden_premises_inputs.set('html', address_building_details);
		
		address_street.set('value', data.street);
		address_town.set('value', data.town);
		address_county.set('value', data.county);
	}
	
	//Hide House Name and number in case they are visible (this is possible)
	address_building_name_container.setStyle('display','none');
	address_building_number_container.setStyle('display','none');
}

function set_building_details()
{
	var address_building = $$("#input_select_building select");
	var address_building_name_container = $$("#input_text_house_name");
	var address_building_name = $$("#text_house_name");
	var address_building_number_container = $$("#input_text_house_number");
	var address_building_number = $$("#text_house_number");
	
	var premises_id = address_building.get('value');
	var building = '';
	var number = '';
	
	//If 'Other' is selected, show house name and number
	if(premises_id == 'other')
	{
		address_building_name_container.setStyle('display','block');
		address_building_number_container.setStyle('display','block');
	}
	//If not default option
	else if(premises_id != '')
	{
		building = $$('#premises_' + premises_id + '_building').get('value');
		number = $$('#premises_' + premises_id + '_number').get('value');
		
		address_building_name_container.setStyle('display','none');
		address_building_number_container.setStyle('display','none');
	}
	//If default option
	else
	{
		address_building_name_container.setStyle('display','none');
		address_building_number_container.setStyle('display','none');
	}

	address_building_name.set('value', building);
	address_building_number.set('value', number);
}

//Stop form submitting on keypress of 'Return'/'Enter' in postcode
var keyDown = function(event){
	if(event.key == 'enter')
	{ 
		return false;
	}
	
};
 
window.addEvent('domready', function() {
    $$('#text_post_code').addEvent('keydown', keyDown);
});