BackboneJs

  this.renderFeedback(model);

                var $userScored = model.get('score'); //find out what the user scored from the model
                var sortable = [];
                $(model.collection.models).each(function(i) {
                    if(this.get('type') == 'feedback') {
                        sortable.push(this); // put all the feedbacks into an array to be sorted. (just in case XML is out of order)
                    }
                });
                sortable.sort(function(a, b) {return a[1] - b[1]}); // Sort the array into ASC order
                sortable.reverse(); // Reverse the array so the first item is the highest score
                var $topScore = sortable[0].get('score'); // We're assuming here that you're wrong unless you scored the highest possible value

//                console.log('user scored '+$userScored);
//                console.log('top score '+$topScore);

                if( $userScored < $topScore) // if the user scored less than the top marks, reattempt.
                {
                    this.renderRetryButton();
                }