- var ct = xhr.getResponseHeader("content-type"),
- xml = type === "xml" || !type && ct && ct.indexOf("xml") >= 0,
- json = type === "json" || !type && ct && ct.indexOf("json") >= 0,
+ var ct = xhr.getResponseHeader("content-type") || "",
+ xml = type === "xml" || !type && ct.indexOf("xml") >= 0,