jQuery to handle an OAuth challenge response

get-oauth.js

function GetCommentsWithOAuth(){
    viewModel.comments([]);
    $.ajax({ url: "/services/comments/oauth",
        accepts: "application/json",
        cache: false,
        statusCode: {
            200: function(data){
                viewModel.comments(data);
            },
            
            401: function (jqXHR, textStatus, errorThrown) {
                var wwwAuthHeaderValue = jqXHR.getResponseHeader("WWW-Authenticate");
                    
                //get the location paramater and call it in an ajax modal
                var re = /\w+\slocation="([/\.\?\=:&\w]+)"/i;
                var results = re.exec(wwwAuthHeaderValue);
                var authZServerUrl = results[1];
                    
                alert("navigating to: " + authZServerUrl);
                var w = window.open(authZServerUrl, null, 'width=900,height=600,toolbar=no,menubar=no');
            },
            
            403: function() {
                alert('Sorry, are not authorized');
            }
        }
    });
}