/*********************************************
	Coupon
*********************************************/	
function checkCoupon() {
	$('coupon_loading').update('');
	if (!$F("coupon")) return;
	var params = 'coupon=' + $F("coupon");    
    var url = 'ajax/processing/ajax.coupon.php';    
    var myAjax = new Ajax.Request(   
                    url,    
                    {method: 'post', parameters: params, onLoading: $('coupon_loading').update(loadimg), onComplete: checkCouponResponse}    
                 );   
}

function checkCouponResponse(e) {
	$('coupon_loading').update('');
	if (e.responseText == 'success') {
		$('coupon_div').hide();
		$('coupon_result').update('<br>This coupon (<b>'+$F("coupon")+'</b>) is valid. <a href="javascript:void(0)" onclick="applyCoupon()">Click here to apply coupon.</a>');
	} else if (e.responseText == 'fail') {
		$('coupon_loading').update('<div class="error">invalid/expired</div>');
	}
}

function applyCoupon() {
	useCoupon = 1;
	showPrice();
	$('coupon_result').update('<br>* Coupon used: <b>'+$F("coupon")+'</b>');
}