var refresh_header_cart = function() {
	var carts = Cookie.read('carts');
	if (carts == null) {
		$('nav-cart').innerHTML = 'Enquiry cart (0 Product)';
		return;
	}
	carts = JSON.decode(carts);
	var length = 0;
	for (var key in carts){
		if (carts.hasOwnProperty(key)) length++;
	}
	if (length == 0 || length == 1) {
		$('nav-cart').innerHTML = 'Enquiry cart ('+length+' Product)';
		return;
	}
	$('nav-cart').innerHTML = 'Enquiry cart ('+length+' Products)';
}