Automatic timestamp when a cell is filled out

Question

I have an excel formula that is very simple and it works because I can restrict the recursive iterations. I am not very script savvy, but this is what it is and it works.

Answer 1

Just addition to above code FOR Multi Column AutoStamp in Same Sheet

function onEdit() {
  var s = SpreadsheetApp.getActiveSheet();
  if( s.getName() == "Sheet1" ) { //checks that we're on the correct sheet
    var r = s.getActiveCell();
    if( r.getColumn() == 5 ) { //checks the column
      var nextCell = r.offset(0, 1);
      //if( nextCell.getValue() !== '' ) //is empty?
      nextCell.setValue(new Date());
    }

    if( r.getColumn() == 7 ) { //checks the column
      var nextCell = r.offset(0, 1);
      //if( nextCell.getValue() !== '' ) //is empty?
      nextCell.setValue(new Date());
    }

    if( r.getColumn() == 9 ) { //checks the column
      var nextCell = r.offset(0, 1);
      //if( nextCell.getValue() !== '' ) //is empty?
      nextCell.setValue(new Date());
    }
  }
}