How to split and take two columns alone in a csv file using Jquery

Question

Html of the page:

    <input type="file" id="fileUpload" />
     <input type="button" id="upload" value="Upload" />
     <hr />
     <div id="dvCSV">
     </div>
     <script type="text/javascript" 
     src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
     <script src="~/js/site.js"></script>

The below Script is bind to the Upload Button it is working fine in splitting the csv

$(function ()
{
$("#upload").bind("click", function ()
{
    var regex = /(.csv)$/;
    if (regex.test($("#fileUpload").val().toLowerCase()))
    {
        if (typeof (FileReader) != "undefined")
        {
            var reader = new FileReader();
            reader.onload = function (e)
            {
                var table = $("<table />");
                var rows = e.target.result.split("\n");
                for (var i = 0; i < rows.length; i++)
                {
                    var row = $("<tr />");
                    var cells = rows[i].split(",");
                    if (cells.length > 1)
                    {
                        for (var j = 0; j < cells.length; j++)
                        {
                            var cell = $("<td />");
                            cell.html(cells[j]);
                            row.append(cell);
                        }
                        table.append(row);
                    }
                }
                $("#dvCSV").html('');
                $("#dvCSV").append(table);
            }
            reader.readAsText($("#fileUpload")[0].files[0]);
        }
        else
        {
            alert("This browser does not support HTML5.");
        }
    } else
    {
        alert("Please upload a valid CSV file.");
    }
});
});

Thing I want to clarify is --- the current script Splits the csv file like as in the linked image...in "var rows"(line 14) [1]: https://i.stack.imgur.com/sxdKs.png

I want to split and Take out the values like this in the below linked image :(done using c#) [2]: https://i.stack.imgur.com/1hwwD.png

So that I can perform an verification check on 2 columns before it goes to splitting fully and displayed in web page ...(like duplicates based on both columns).. ....any help..??