[d'Anconia]

Okay so I am having the following problem. I have gotten AJAX to work and am trying to get Javascript to fade out an old review score and fade in with a new score. The important part right now is that when I try to run it I get the following error:

Uncaught ReferenceError: preciseResponseAverage is not defined
(anonymous function)

The following is my current code:

function starSubmitFxn(starNumber) {
    function fadeIn(average, color){
        'use strict';
        var ratingAverage = document.getElementById('rating_average');
        ratingAverage.innerHTML = (average);
        //now time to change the ratings color
        var entityRating = document.getElementById('rating');
        entityRating.style.color = color;
        window.color = color;
    }
    'use strict';
    window.fade('rating');
    //setTimeout("fade('rating')", 1000);
    var ajax = getXMLHttpRequestObject();
    if (ajax) {
                var currentUsername = '<?php echo $current_username; ?>';
                var currentEntityId = <?php echo $entity_id; ?>;
                // Create the Ajax object:
                
                ajax.onreadystatechange = function () {
                    if (ajax.readyState === 4) {
                        //Check the status code:
                        if ( (ajax.status >= 200 && ajax.status < 300) || (ajax.status === 304) ) {
                            
                            //document.getElementById('ajax_status').innerHTML = ajax.responseText;
                            
                            var starResponse = JSON.parse(ajax.responseText);
                                                        
                            var starResponseNumber = parseInt(starResponse["1"].value);
                            var starResponseAverage = (parseInt(starResponse["1"].average));
                            var preciseResponseAverage = starResponseAverage.toPrecision(2);
                            var starResponseColor = starResponse["1"].newColor;
                            
                            //var ratingDiv = document.getElementById('rating');
                            
                            U.removeEvent(U.$('star_rating_div'), 'mouseout', function(){ newStarRating("<? echo $current_user_review_rows['review_score'] ?>", 'blue'); } );
                            U.addEvent(U.$('star_rating_div'), 'mouseout', function(){ newStarRating(starResponseNumber, 'blue'); } );
                                if (!isNaN(starResponseNumber)) {
                                                                        
                                    //newStarRating(ratingNumber, "blue");//end of newStarRating call
                                        var i = null;
                                        for (i = 1; i <= 10; i++) {
                                        document.getElementById('rating_star_' + i).src = '../images/white_star_17px.png';
                                        } //end of star color reset

                                        var j = null;
                                        for (j = 1; j <= starResponseNumber; j++) {
                                            document.getElementById('rating_star_' + j).src = '../images/blue_star_17px.png';
                                        }
                                    
                                    } //end of response text check
                                if(!isNaN(preciseResponseAverage)) { //if a number is returned, time to fade out / in
                                    
                                    setTimeout("fadeBackIn(preciseResponseAverage, starResponseColor)", 400);
                                    
                                }
                            } //end of Ajax connectivity check
                            else { //if Ajax status text is a failure
                                
                                }
                        } //end of Ajax ready state
                    }; //end of function for execution on ready state change
                    
                var data = 'currentUsername=' + encodeURIComponent(currentUsername) + '&currentEntityId=' + encodeURIComponent(currentEntityId) + '&starNumber=' + encodeURIComponent(starNumber);
                ajax.open('POST', '../resources/star_submit.php?' + data, true);
                ajax.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');

                ajax.send(data);
        } //end if ajax object exists
        else {
            
        } //end if it doesn't exist
    } //end of starSubmitFxn

There are some functions defined outside of this function but I don't think those are necessary for me to post right now. The issue seems to be that I'm not sure how to properly send a variable to a function when that function is called via setTimeout. Any help would be appreciated. Thank you.