var shopping_cart;
function setShoppingCart(str){
	try{
		shopping_cart=eval(str);
	}catch(e){
		return false;
	}
}
function additem(no){
	var qty=parseInt($('Detail_Qty').value,10);
	if(qty<0) return false;
	if(typeof(shopping_cart)=='undefined') shopping_cart=new Array();

	var index=-1;
	for(var i=0;i<shopping_cart.length;i++){
		if(shopping_cart[i].no==no)
			index=i;
	}
	if(index>-1)
		shopping_cart[index].qty=qty;
	else{
		var item={'no':parseInt(no,10),'qty':qty};	
		shopping_cart.push(item);
		shopping_cart.sort(function(a,b){return a.no-b.no});
	}
	ajax.request('shop_handle.php?act=update&sc='+Obj2Source(shopping_cart),function(str){getshoppingbag();},true,false);
}