title: I need help to Timestamp specific tabs in a sheet
body: <p>Here is the current script I have written in App Script to timestamp but i need to be able to timestamp specific tabs in a doc:</p>
  <pre><code>function TIMESTAMPOACStart(e) {
    var row = e.range.getRow();
    var col = e.range.getColumn();
    if (col == 4) {
      e.source.getActiveSheet().getRange(row,5).setValue(new Date());
    }
  }
  </code></pre>
  <p>What do i need to edit to get this correct?</p>