//
function ReadOrderForm(name){
    var cookieString=document.cookie;
    if (cookieString==""){ return false; } else {
        var firstChar,lastChar;
        firstChar=cookieString.indexOf(name);
        if (firstChar!=-1){
            firstChar += name.length + 1;
            lastChar = cookieString.indexOf(';', firstChar);
            if (lastChar == -1) lastChar=cookieString.length;
            return cookieString.substring(firstChar,lastChar);
        } else {
            return false;
        }
    } 
}

function SetOrderForm( item_no, item_size, item_name, item_amount, item_price ){
	var cookieString = document.cookie;
	if ( cookieString.length >= 4000 ){
		alert("您的订单已满\n请结束此次订单操作后添加新订单！");
	} else if ( isNaN(item_amount) || item_amount < 1 || item_amount.toString().indexOf("|") != -1 ){
		alert("数量输入错误！");
	} else {
		var mer_list = ReadOrderForm('SJW_OrderForm');
		var Then = new Date();
		Then.setTime( Then.getTime() + 30 * 60 * 1000 );
		var item_detail = "|" + item_no + "&" + item_size + "&" + item_name + "&" + item_amount + "&" + item_price;
		if( mer_list==false ){
			document.cookie="SJW_OrderForm="+escape(item_detail)+";expires=" + Then.toGMTString();
			alert("进入购物车里面修改数量与下订单！");
			location.href('ShoppingCar.asp');
		}
		else{
			if (mer_list.indexOf(item_no)!=-1){
				alert('此商品您已添加\n请进入订单修改数量！')
				location.href('ShoppingCar.asp');
			} else {
				document.cookie="SJW_OrderForm="+mer_list+escape(item_detail)+";expires=" + Then.toGMTString();
				alert("“"+item_name+"”\n"+"已经加入您的订单！");
				location.href('ShoppingCar.asp');
			}
		}
	}
}

function updateCookie(){
    var limit = document.OrderForm.elements.length-4;
    if (document.OrderForm.update.value=="修改订单"){
        document.OrderForm.update.value="更新订单";
        document.OrderForm.submit.disabled=true;
        for (i=1;i<limit;i++){
            document.OrderForm.elements[i].disabled=false;
            i=i+2;
            document.OrderForm.elements[i].disabled=false;
        }
    } else {
        document.OrderForm.update.value="修改订单"
        document.OrderForm.submit.disabled=false;
        for (i=1;i<limit;i++){
            document.OrderForm.elements[i].disabled=true;
            i=i+2;
            document.OrderForm.elements[i].disabled=true;
        }
        var Then = new Date();
        Then.setTime(Then.getTime()+30*60*1000);
        var values=document.getElementById("storage").value
        document.cookie="SJW_OrderForm="+escape(values)+";expires=" + Then.toGMTString();
    }
}

function Delete(TableID,id){
    if ( window.confirm("确定要删除吗？") ){
        var deletedList = document.getElementById("storage").value;
        var broken_deletedList = deletedList.split("|");
        for (var i=1; i<broken_deletedList.length; i++){
            if(broken_deletedList[i].indexOf(id)!=-1) delete broken_deletedList[i];
        }
        var new_deletedList="";
        for (var i=1; i<broken_deletedList.length; i++){
             if (broken_deletedList[i]!=undefined){
				 new_deletedList = new_deletedList + "|" + broken_deletedList[i];
			 }
        }
        document.getElementById("storage").value = new_deletedList;
        document.getElementById("CarList").deleteRow(TableID);
        updateTotal();
		updateCookie();
    }
}

function updateTotal(){
	var new_total=0;
	var limit=document.OrderForm.elements.length-4;	
	for (var i=2; i<limit; i=i+3){
		new_total=new_total*100+document.OrderForm.elements[i].value*100;
		new_total=new_total/100;
	}	
	if( isNaN(new_total) ){
		document.getElementById("total").value="输入错误";
	} else {
		document.getElementById("total").value=new_total;
	}
}

function updateSubTotal(m_id,new_amount,price){
	var price = price * 100;
	var new_subtotal = new_amount * price / 100;
	var n_m_id = "id" + m_id;
	if( isNaN(new_amount) || new_amount<1 || new_amount.toString().indexOf('.')!=-1 ){
		document.OrderForm.elements[n_m_id].value = "购买数量必须填写整数";
	} else {
		document.OrderForm.elements[n_m_id].value = new_subtotal;
	}
	updateTotal();
}

function updateStorage(m_id,new_amount){
	if( isNaN(new_amount) || new_amount<1 || new_amount.toString().indexOf('.')!=-1 ){
		alert("购买数量必须填写整数！")
		document.OrderForm.elements["aid"+m_id].focus();
		document.OrderForm.elements["aid"+m_id].select();
	} else {
		var the_list = document.getElementById("storage").value;
		var single_list=the_list.split("|");		
		for (i=1;i<single_list.length;i++){
			if (single_list[i].indexOf(m_id)!=-1){
				var old_single = single_list[i];
				var broken_single_list = single_list[i].split("&");
				broken_single_list[3] = new_amount;
				var new_single = broken_single_list[0] + "&" + broken_single_list[1] + "&" +
				                 broken_single_list[2] + "&" + broken_single_list[3] + "&" + 
								 broken_single_list[4];
				the_list = the_list.replace(old_single,new_single);
			}
		}
		document.getElementById("storage").value = the_list;
	}
}