/* HOME PAGE carousel
******************************************/

/**
 * We use the initCallback callback
 * to assign functionality to the controls
 */
 
function mycarousel_initCallback(carousel) {
    jQuery('.jcarousel-control a').bind('click', function() {
        carousel.scroll(jQuery.jcarousel.intval(jQuery(this).text()));
        return false;
    });

    jQuery('.jcarousel-scroll select').bind('change', function() {
        carousel.options.scroll = jQuery.jcarousel.intval(this.options[this.selectedIndex].value);
        return false;
    });

    jQuery('#mycarousel-next').bind('click', function() {
        carousel.next();
        return false;
    });

    jQuery('#mycarousel-prev').bind('click', function() {
        carousel.prev();
        return false;
    });
};

// Ride the carousel...
jQuery(document).ready(function() {
    jQuery("#mycarousel").jcarousel({
		wrap: 'circular',
        scroll: 3,
        initCallback: mycarousel_initCallback,
        // This tells jCarousel NOT to autobuild prev/next buttons
        buttonNextHTML: null,
        buttonPrevHTML: null
    });
});



/* HOME PAGE carousel
******************************************/
	
	
	
	
	
// Energy Savings Calculator //
function ecalc_calculate(carbon_per_kwh){
	
	var tariff_cost = document.getElementById('tariff_cost_per_kwh').value;
	var no_lamps =  document.getElementById('no_lamps').value;
	var watts_per_lamp =  document.getElementById('watts_per_lamp').value;
	var hours_per_day =  document.getElementById('hours_per_day').value;
	var hours_occupied_per_day =  document.getElementById('hours_occupied_per_day').value;
		
	if(tariff_cost > 0 && no_lamps > 0 && watts_per_lamp > 0 && hours_per_day > 0 && hours_occupied_per_day > 0){
		document.getElementById('cost_per_kwh').value = tariff_cost;
		document.getElementById('energy_uncontrolled').value = ((hours_per_day * watts_per_lamp * no_lamps * 365) /1000).toFixed(2) ;	
		document.getElementById('energy_controlled').value =( (hours_occupied_per_day * watts_per_lamp * no_lamps * 365) /1000 ).toFixed(2);			
		var cost_uncontrolled = 	(tariff_cost * document.getElementById('energy_uncontrolled').value / 100 ).toFixed(2);			
		document.getElementById('cost_uncontrolled').value = '£'+cost_uncontrolled;
		document.getElementById('co2_uncontrolled').value = (carbon_per_kwh * document.getElementById('energy_uncontrolled').value).toFixed(2) ;					
		var cost_controlled = 	(tariff_cost * document.getElementById('energy_controlled').value / 100 ).toFixed(2);							
		document.getElementById('cost_controlled').value = '£'+cost_controlled;		
		document.getElementById('co2_controlled').value = (carbon_per_kwh * document.getElementById('energy_controlled').value).toFixed(2) ;							
		document.getElementById('cost_saving').value = '£'+(cost_uncontrolled - cost_controlled).toFixed(2);
		document.getElementById('co2_saving').value = (document.getElementById('co2_uncontrolled').value - document.getElementById('co2_controlled').value).toFixed(2);
		document.getElementById('energy_saving').value =( (1 - document.getElementById('energy_controlled').value / document.getElementById('energy_uncontrolled').value) * 100).toFixed(0)+'%';

	}else{
		document.getElementById('cost_per_kwh').value = '';
		document.getElementById('energy_uncontrolled').value = '';
		document.getElementById('energy_controlled').value = '';
		document.getElementById('cost_uncontrolled').value = '';
		document.getElementById('co2_uncontrolled').value = '';
		document.getElementById('cost_controlled').value = '';
		document.getElementById('co2_controlled').value = '';
		document.getElementById('cost_saving').value = '';
		document.getElementById('co2_saving').value = '';
		document.getElementById('energy_saving').value = '';
	}
}