Copy a HTML table via JavaScript without the headers?

Using the JavaScript sample found in this stack overflow post you can have a button that automatically selects a table. This selected table can then be copied to the clipboard.

My users will be copying this data into an Excel template and do not need the header information (<th></th> or <thead></thead>).

My table looks something like this:

<table class="sortable">
<thead>
  <tr><th>Person</th><th>Monthly pay</th></tr>
</thead>
<tbody>
  <tr><td>Bob</td><td>£12,000</td></tr>
  <tr><td>Doug</td><td>£8,500</td></tr>
  <tr><td>Sam</td><td>£9,200</td></tr>
  <tr><td>Nick</td>开发者_C百科;<td>£15,300</td></tr>
</tbody>
<tfoot>
  <tr><td>TOTAL</td><td>£45,000</td></tr>
</tfoot>
</table>

How would I go about unselecting the header information?

UDPATE1

The key is to select the tbody (assuming you Do not want tfoot).

<input type="image" src="table.png" name="image" onclick="selectElementContents( document.getElementById('theebody') );">

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If the <table> has a <thead> and <tbody>, you could just select the <tbody>. However if you have header row(s) as sibling of other rows... here is a good start on how to set the range with more control.