appendChild(clone) with new id at end of <tr>

You do not want to append the row to the other row.
You want to append the row to the tbody

This code was tested in IE7 and FF3

<table border="1" id="t1">
<tr><td><input type="button" value="delete row" onclick="deleteRow()" /></td></tr>
<tr><td><input type="button" value="append row" onclick="copyAppendRow()" /></td></tr>
<tr id="row1"><td>field 1</td></tr>
<tr id="row2"><td>field 2</td></tr>
</table>
<script type="text/javascript">
/*delete first row:*/
function deleteRow() {
        document.getElementById("row1").parentNode.removeChild(row1);
}
 
function copyAppendRow() {
        /*clone Element:*/
        var row2El=document.getElementById("row2");
        var clone=row2El.cloneNode(true);
        clone.id="row3";
        /*get Element with id row2, clone Content into variable 'clone'*/
        /*true or false refers to cloning the content*/
        /*now do whatever you want with the cloned element*/
        /*in this case we are appending it to the row2 Element's parentNode (the tbody) */
        row2El.parentNode.appendChild(clone);
        alert(document.getElementById('t1').innerHTML)
}
 
</script>

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Hi mplungjan,

Thank you so much for this insight and code. Works well. Is there an easy way to change the id and increment it. So the next id is "row3", "row4", "row5", etc.

Thank you,
vkimura

Sure

But do you want to add the row after a given row, or always to the end?

<table border="1" id="t1">
<tr><td><input type="button" value="delete row" onclick="deleteRow()" /></td></tr>
<tr><td><input type="button" value="append row" onclick="copyAppendRow()" /></td></tr>
<tr id="row1"><td>field 1</td></tr>
<tr id="row2"><td>field 2</td></tr>
</table>
<script type="text/javascript">
/*delete first row:*/
function deleteRow() {
  document.getElementById("row1").parentNode.removeChild(row1);
}
 
function copyAppendRow() {
  var table = document.getElementById("t1");
  var lastRow = table.rows[table.rows.length-1]; // last row
 
  /*clone Element:*/
  /*get row, clone Content into variable 'clone'*/
  var clone=lastRow.cloneNode(true);
  /*true or false refers to cloning the content*/
//  clone.id="row"+(table.rows.length-1); // call it rowX where X is the current number of actual rows
  // get the ID from the row instead of using the number of rows
  var num = (lastRow.id.indexOf('row')!=-1)?parseInt(lastRow.id.replace('row','')):1; // perhaps we deleted all rows
  var id = "row"+(num+1);
  clone.id=id;
  /*now do whatever you want with the cloned element*/
  /*in this case we are appending it to the TBODY */
  lastRow.parentNode.appendChild(clone);
  alert(table.innerHTML); // show what we did
}
 
</script>

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Hi mplungjan,

Wow, that's great. I suppose it would be nice to be able to add the row to the end or after or before. Is it easy to show me how?

Thank you so much for your help. You're really a genius at Javascript. It's something I'm beginning to learn.

Cordially,
vkimura

Thank you.