Dynamically generated table – using an array to fill in TD values

Change:

var tr = document.createElement('TR'); // this should be inside the first loop
tableBody.appendChild(tr); // this should be just before the first loop is over

for (i=0; i<stock.length; i++) {
    for (j=0; j<stock[i].length; j++)    {
      var td = document.createElement('TD')
      td.appendChild(document.createTextNode(stock[i][j]));
      td.appendChild(td) // this should be tr.appendChild(td)
    }
}

to this:

for (i = 0; i < stock.length; i++) {
    var tr = document.createElement('TR');
    for (j = 0; j < stock[i].length; j++) {
        var td = document.createElement('TD')
        td.appendChild(document.createTextNode(stock[i][j]));
        tr.appendChild(td)
    }
    tableBody.appendChild(tr);
}

Fiddle