JQuery Datatables - Need Dialog that pops up value from hidden column

I am attempting to build an FAQ tool using dataTables and I am trying to add code that will display a dialog box when a row is clicked on the table.

However, the field (Column 4) is hidden using the dataTables configuration and I wanted  to display this value in a pop up dialog.  Code is below for the table and the click function. Right now it is not triggering at all and now the Search box can't be used anymore.

I am trying to validate the value first by just displaying it as an alert.  Let me know if I am missing a component.

$(document).ready(function() {
    $('#faq_table').DataTable( {
      "columns": [
    { "bSortable": false },
    { "bSortable": false },
    { "visible": false },
    { "visible": false },
    { "visible": false },
    { "visible": false }
   "columnDefs": [
    { "width": "50px", "targets": 2 }
        "bPaginate": false,
        "bInfo": false    
    } );

$('#faq_table tbody td').click( function () {
    // Get the position of the current data from the node
    dataTable = $('#faq_table');
    var aPos = dataTable.fnGetPosition( this );
    // Get the data array for this row
    var aData = dataTable.fnGetData( aPos[4] );

} );


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THIS IS THE HTML for the page if it helps.


#faq_table {
    width: 75% !important;
.ui-widget {
        font-size: .7em !important;

.datatables_filter {
float: left;
top: -40px;
left: 10px;

{ font-size: 14px !important; }

th {    

.dumbBoxWrap { /* The div that shows/hides. */ display:none; /* starts out hidden */ z-index:40001; /* High z-index to ensure it appears above all content */ } 

.dumbBoxOverlay { /* Shades out background when selector is active */ position:fixed; width:100%; height:100%; background-color:black; opacity:.5; /* Sets opacity so it's partly transparent */ -ms-filter:"progid:DXImageTransform.Microsoft.Alpha(Opacity=50)"; /* IE transparency */ filter:alpha(opacity=50); /* More IE transparency */ z-index:40001; } 

.vertical-offset { /* Fixed position to provide the vertical offset */ position:fixed; top:30%; width:100%; z-index:40002; /* ensures box appears above overlay */ } 

.dumbBox { /* The actual box, centered in the fixed-position div */ width:400px; /* Whatever width you want the box to be */ position:relative; margin:0 auto; /* Everything below is just visual styling */ background-color:white; padding:10px; border:1px solid black; } 


<link rel="stylesheet" type="text/css" href="http://pghcc.jnj.com/Style%20Library/Includes/jquery-ui.css">
<link rel="stylesheet" type="text/css" href="http://pghcc.jnj.com/Style%20Library/Includes/datatables/jquery.dataTables-1.10.5.min.css">
<link rel="stylesheet" type="text/css" href="http://pghcc.jnj.com/Style%20Library/Includes/tabletools/dataTables.tableTools.css">

<textarea id="jsoninfo"></textarea>
<textarea id="jsoninfo2"></textarea>
<script type="text/javascript" src="http://pghcc.jnj.com/Style%20Library/Includes/jquery-1.8.3.min.js"></script>
<script type="text/javascript" src="http://pghcc.jnj.com/Style%20Library/Includes/jquery.SPServices-0.7.2.min.js"></script>
<script type="text/javascript" src="http://pghcc.jnj.com/Style%20Library/Includes/jquery.SPServices-0.7.2.min"></script>
<script type="text/javascript" src="http://pghcc.jnj.com/Style%20Library/Includes/json2.js"></script>
<script type="text/javascript" src="http://pghcc.jnj.com/Style%20Library/Includes/omreports_faq.js"></script>
<script type="text/javascript" src="http://pghcc.jnj.com/Style%20Library/Includes/jquery-ui.js"></script>
<script type="text/javascript" src="http://pghcc.jnj.com/Style%20Library/Includes/datatables/jquery.dataTables-1.10.5.min.js"></script>

<script type="text/javascript"> 

$(document).ready(function() {         

//Show modal box         

//Hide modal box         

<td height="100px"><b>O&M Reports FAQ Search (Beta)</b></td>

<table id="faq_table" class="display">
<th id="question">Question</th>
<th id="answer">Answer</th>
<th id="keywords">Keywords</th>
<th id="cat1">Category1</th>
<th id="cat2">Category2</th>

<div class="dumbBoxWrap"> 
<div class="dumbBoxOverlay">&nbsp;</div>     
<div class="vertical-offset"> 
<div class="dumbBox">Content goes here</div> 

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Adam EhrenworthLead Technology AnalystAsked:
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F IgorDeveloperCommented:
Try using index 0 instead of 4. When you select from cells (TD) the function returns an array with one item (row). And then you can access the cell using aData[cellPosition].

Try this code

//get Row
var aData = dataTable.fnGetData( aPos[0] );
//get cell position 4
var celldata=aData[4]);

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Adam EhrenworthLead Technology AnalystAuthor Commented:
I am assuming I needed to define what "dataTable" is in the code, Also I am getting this error in the Console... Uncaught ReferenceError: aPos is not defined

What needs to be adjusted?  for the final code I am trying to click on a cell and then get a value from a different (hidden) column in the same row.  Would the "this" reference work for that purpose?

/get Row
oTable = $('#faq_table');
var aData = oTable.fnGetData( aPos[0] );
//get cell position 4
var celldata = aData[4];

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Adam EhrenworthLead Technology AnalystAuthor Commented:
I was able to get the value using instruction from API once i knew where to look... thanks for suggestion

$(document).ready(function() {
var table = $('#faq_table').DataTable();
$('#faq_table tbody').on( 'click', 'tr', function () {
var rowval = table
        .row( this )

    console.log(table.cell( rowval, 3 ).data());  

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Adam EhrenworthLead Technology AnalystAuthor Commented:
I was able to locate the necessary code  from DataTables API reference
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