var dataArray = new Array;
        function parseCSV(dataArray) {
            //replace UNIX new lines
            data = data.replace(/rn/g, "n");
            //replace MAC new lines
            data = data.replace(/r/g, "n");
            //split into rows
            var rows = data.split("n");

            // loop through all rows
            for (var i = 0; i < rows.length; i++) {
                // this line helps to skip empty rows
                if (rows[i]) {
                    // our columns are separated by comma
                    var column = rows[i].split(",");


                    var date=column[0];
                    var value = column[4];

                    // create object which contains all these items:
                    var dataObject = {
                        date: date,
                        T4: value
                    };
                   dataArray.push(dataObject);
                }
            }
        }
        }

<script type="text/javascript">
       var x= dataArray[1][4];
        document.write(x);
    </script>