Object is undefined - any insight appreciated.

Object is undefined - any insight appreciated.


I posted this to the jQuery en list but think it might be relevant to
the devs as well. And I would appreciate any insight that the
development community has.
FireBug is reporting this error.
jquery.js (line 3633)
object is undefined
[Break on this error] var name, i = 0, length = object.length;\n
I am using jQuery 1.3.2
Here is my code.
var that=this;
jQuery.ajax({
type : "POST",
dataType : "json",
url : "js/tsbtw-object.js",
success : function(data, statusText){
var verbArray = data.verbs;
var adjArray = data.adjectives;
var subjArray = data.subjects;
for(var i = 0; i<verbArray.length; i++){
var verbTime = Math.floor(Math.random()*1000);
jQuery("#verb-content").fadeOut(verbTime,
function(){
jQuery(that).text(verbArray[i]).fadeIn
(verbTime);
});
}
for(var j = 0; j<adjArray.length; j++){
var adjTime = Math.floor(Math.random()*2000);
jQuery("#adj-content").fadeOut(adjTime, function
(){
jQuery(that).text(adjArray[j]).fadeIn
(adjTime);
});
}
for(var k = 0; k<subjArray.length; k++){
var subjTime = Math.floor(Math.random()*3000);
jQuery("#subj-content").fadeOut(subjTime,
function(){
jQuery(that).text(subjArray[k]).fadeIn
(subjTime);
});
}
},
error: function (xhr, ajaxOptions, thrownError){
alert(xhr.statusText);
alert(thrownError);
}
});