[jQuery] add/remove and recalculate index

[claudes]

i have an interface that allows user to add chapters and remove any chapter
from within the group. i'm having issues re-calculating the sort order.
currently if user adds four chapters (1,2,3,4), removes 2 and adds two more
the order becomes (1, 3,4,2,3). i know i need to so something with index
calculation...but how to is what is confusing me. this is the code that
performs the add remove. 


$("#chapter-append").click(function() { 
                        var chapterCount = new 
Number($("#chapter-count").val());
                                if (chapterCount <1) chapterCount=0;
                chapterCount = chapterCount +1;
                 $("#chapter-count").val(chapterCount);
                
                var queryString = 
"add-chapter.php?chapter-number="+chapterCount;
                //alert(queryString);
         $.get(queryString, function(html) { 
             // append the "ajax'd" data to the table body 
             $("ol#add-chapter").append(html); 
                                                $("ol#add-chapter li 
h4").bind('click', function() { 
                                                                var newChapter 
= "#chapter-"+chapterCount+"-container";
                                                        $(newChapter).remove(); 
                                                                        
chapterCount = chapterCount -1;
                                                                        
$("#chapter-count").val(chapterCount);
                                                                        return 
false;
                                                });
                                                $('textarea').autogrow({ 
minHeight: 144, lineHeight: 16});      
                                                
$('textarea.for-url').autogrow({ minHeight: 24, lineHeight: 16});
                                }); 
        return false; 
        });

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