Guild wars 2 spidey

<!DOCTYPE html>
<html><head></head>
<body>
<a href="http://www.gw2spidy.com/">Search this for items, item ID will be http://www.gw2spidy.com/item/{item ID}</a>
<script>
var item = null;
var m = null;
var moneyToSpend= 0;
var moneyYoullGet= 0;
var itemsGetting = "";
var itemsSelling= "";

function Item(I)
{
    if(I.result)
    {
        item=I.result;
        if(m>0)
        {
            moneyToSpend+=m*item["max_offer_unit_price"];
            itemsGetting+=m+" "+item['name']+", ";
        }
        if(m<0)
        {
            moneyYoullGet+= -m*item["min_sale_unit_price"];
            itemsSelling+= -m+" "+item['name']+", ";
        }
        var npc = +document.getElementById('npc').value;
        var multi = +document.getElementById('multiplier').value;
        var span = document.getElementById("output");
        span.innerText = "To Buy: "+itemsGetting+"\n";
        span.innerText+= "To Sell: "+itemsSelling+"\n";
        span.innerText+="Minimum purchase price:"+numberToGSC((moneyToSpend+npc)*multi)+"\n";
        span.innerText+="Maximum Sale Price with after market fee:"+numberToGSC(parseInt(moneyYoullGet*0.85*multi))+"\n";
        span.innerText+="Profit:"+numberToGSC(parseInt((moneyYoullGet*0.85-moneyToSpend-npc)*multi))+"\n";
    }
    else m = I;
}
function refreshClicked()
{
    var scripts = document.getElementById("loadScript");
    while(scripts.childNodes.length>0)
    {
        scripts.removeChild(scripts.childNodes[0]);
    }
    moneyToSpend= 0;
    moneyYoullGet= 0;
    itemsGetting = "";
    itemsSelling="";
    var area = document.getElementById("items");
    var txt = area.value;
    var items = txt.split(";");
    for(var i=0; i<items.length; i++)
    {
        if(items[i].length>0)
        {
            var csv = items[i].split(' ');
            var multiplier = parseInt(csv[0]);
            var src= parseInt(csv[1]);
            if(multiplier&&src)
            {

                var script = document.createElement("script");
                script.src = 'http://www.gw2spidy.com/api/v0.9/json/item/'+src+'?callback=Item%28'+multiplier+'%29%3BItem';
                scripts.appendChild(script);
            }
        }
    }
}
function numberToGSC(num)
{
    var txt = num.toString();
    var response = "";
    for(var i=1; i<=txt.length; i++)
    {
        var nxt =txt.charAt(txt.length-i);
        if(i==1&&txt.length!=i-1)nxt+="(c)";
        if(i==3&&txt.length!=i-1)nxt+="(s) ";
        if(i==5&&txt.length!=i-1)nxt+="(g) ";
        response = nxt+response;
    }
    return response;
}
function saveLastResult()
{
    document.getElementById("saved").innerHTML+=document.getElementById("output").innerHTML+"<br>";

}
function updateNPCOut(npc)
{
    var npcOut = document.getElementById("npcOut");
    npcOut.innerText = numberToGSC(npc.value);
}
</script>
<div style="display:hidden" id="loadScript"></div>
<textarea id="items">
5 19721;
28 19701;
-1 13459;
25 24276;
10 24474;
</textarea><br>
Multiplier<input id="multiplier" value="1" type="number"/><br>
NPC Purchaces(<span id="npcOut">0</span>)<input id="npc" value="0" type="number" oninput="updateNPCOut(this)"/><br>
<button onclick="refreshClicked()">Load Items</button><br><br>
<span id="output"></span><br>
<button onclick="saveLastResult()">Keep Result</button><br>
<span id="saved" style="background-color:#AAF"></span>
<textarea>
--Notes
</textarea>
</body>
</html>