GlideAjax getXML Timeout?

[Community Alums]

I have a widget that makes a GlideAjax async call using getXML().  I'm not sure what the default timeout is, but Community posts seem to indicate it is 5 minutes.  This is about 4 minutes and 50 seconds longer than what I need to wait before displaying some indication to the user that a problem has occurred.   Are there any provisions in GlideAjax simliar to jQuery's .ajax(timeout) param, or an .abort() option that I can call from inside a separate setTimeout()?

jQuery .ajax timeout example:

$.ajax({
    url: "somepage.html",
    error: function(){
        // will fire when timeout is reached
    },
    success: function(){
        //do something
    },
    timeout: 3000 // sets timeout to 3 seconds
});