在Firefox中使用jQuery解析XML的问题。

I'm using JavaScript/jQuery trying to parse an XML document that's been fetched via an AJAX Get request. I can't post the XML document, but it is well-formed and the tags that I'm looking for are present. The AJAX request is successful and returns the full XML document in both Chrome and Firefox--now I just can't parse it, for some reason. The code is working in Chrome but not Firefox or IE. I'm not really interested in IE right now, but I'm lost as to why it isn't working in Firefox. I'm using JavaScript/jQuery trying to parse an