How to get all value from my tr

How to get all value from my tr

Hi,
I need your help to get all data from my table
I've tryed this:

   var table = document.getElementById('miaTab');
    var rowLength = table.rows.length;

    for(var i=2; i<rowLength; i+=1)
    {
      var row = table.rows[i];

      var cellLength = row.cells.length;
     
      for(var y=0; y<cellLength; y+=1)
      {
        var valore = row.cells[y];
         alert("val ->"+valore)
      }
    }
 the alert shows: val ->[object HTMLTableCellElement]

Can someone helps me, please

Thanks, Tegatti