jquery $ .ajax调用在Chrome或Firefox中导致401未经授权的响应，但在IE中有效

I have a script running on a web page that needs to use the JQuery $.ajax method (currently using jquery 1.7.2) to submit several GET requests to a service endpoint on a different domain. I have the ajax call working in IE (9, 10, 11), but it fails with a 401 Unauthorized response in Firefox and Chrome. Part of the additional error message in Chrome is "Full authentication is required to access this resource".I have a script running on a web page that need