Generování CSV, stažení a nastavení parametru filename

<input id="downloadCSV" type="button" value="Download CSV">

//generate CSV as a string
function generateCSV() {
  var str = "";
  for (var i = 0; i <= mRows; i++) 
  {
    if (i == 0) 
    {
      for (var j = 0; j <= mCols; j++) 
      {
        if (j == 0) 
        {
          str += "col/row";
          continue;
        }
        str += "," + j;
      }
    }
    else
    {
      for (var j = 0; j <= mCols; j++) 
      {
        if (j == 0) 
        {
          str += i;
        }
        else
        {
          str += "," + pole[i][j].getPoradi();
        }
      }
    }
    str += "\n";
  }
  
  return str;
}

//add event helped with jQuery
$("#downloadCSV").click(function() {        
  document.location = 'data:text/csv;charset=utf-8,' + encodeURIComponent(generateCSV());    
});