$j(document).ready(function(){
	init();
})

// Event.observe(window, 'load', init);

function init(){
// 	alert('init');
	var q = $$('input.quantity');
	for(var i = 0; i < q.length; i++){
		Event.observe(q[i], 'change', calculatePrice);
	}
	
}

function calculatePrice(e){
	//alert(Event.element(e).id);
	Event.element(e).value = parseInt(Event.element(e).value);
	if( parseInt( Event.element(e).value ) > parseInt( $('item_available_'+Event.element(e).id).value ) ) {
	  Event.element(e).value = $('item_available_'+Event.element(e).id).value;
	  alert('В момента има само '+ Event.element(e).value +' налични!');
	}
	$j.get('ecart.php?page=setcnt&id='+ Event.element(e).id.toString().replace(/\D*/, '') +'&cnt='+ parseInt( Event.element(e).value ), function(){} );
	$('price_prod_'+Event.element(e).id).innerHTML = Event.element(e).value * $('item_price_'+Event.element(e).id).value;
	var spans = $$('span.product_sum_price');
	
	var sum = 0;
	for(var i = 0; i < spans.length; i++){
		sum += Number(spans[i].innerHTML);
	}
	$('amount').innerHTML = sum;
// 	alert(sum);
} 
	
function calculateDelivery(el){
	
	switch(Number(el.value)){
		case 1:
			$('amount_del').innerHTML = del1 + " лв.";		
			break;
		case 2:
			$('amount_del').innerHTML = del2 + " лв.";
			break;
		case 3:
			$('amount_del').innerHTML = del3 + " лв.";
			break;
		default:
			$('amount_del').innerHTML = "Изберете метод за доставка";
	}
}

function checForm(frm){
	if ( $('delivery_methodid').value == null || $('delivery_methodid').value == ""){
		alert("Моля изберете метод на доставка.");
		return false;
	}
}