获得CS：GO库存问题

Question

当使用jQuery尝试获取Steam用户CS：GO库存时，我在javascript控制台中收到错误：

XMLHttpRequest cannot load http://steamcommunity.com/profiles/76561198093634829/inventory/json/730/2. No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://rekit-philipshilling.c9.io' is therefore not allowed access.

我的JavaScript是：

function getSteamInventory() {
    if(isLoggedIn()) {
        var inventoryJson;
        //http://steamcommunity.com/profiles/<STEAMID>/inventory/json/<APPID>/2
        $.getJSON('http://steamcommunity.com/profiles/'+ getSteamData().steamid +'/inventory/json/730/2', function(data) {
            inventoryJson = data;
        });
        return inventoryJson;
    }
    return false;
}

这似乎工作正常，我试图获得JSON的URL工作正常。