Autosum input type=text when checkbox is true

Hi all and thanks in advance for your help

I am looking to create an account page to match up sums

<tr>
	<td align=center><input type="checkbox" name="transID"></td>
	<td><a href=?account=2&transaction=672>22/04/2016</a></td>
	<td>SureSave Account</td><td>Comm return</td><td align=right><input type='text' size=10 name='debitamount' value=-$63.00></td><td>&nbsp;</td>
</tr>
<tr>
	<td align=center><input type="checkbox" name="transID"></td>
	<td><a href=?account=2&transaction=618>28/04/2016</a></td>
	<td>Air Tickets Account</td><td></td><td align=right><input type='text' size=10 name='debitamount' value=$1,471.24></td><td>&nbsp;</td>
</tr>
<tr>
	<td align=center><input type="checkbox" name="transID"></td>
	<td><a href=?account=2&transaction=701>29/04/2016</a></td>
	<td>SureSave Account</td><td>Comm return</td><td align=right><input type='text' size=10 name='debitamount' value=-$45.60></td><td>&nbsp;</td>
</tr>
<tr>
	<td align=center><input type="checkbox" name="transID"></td>
	<td><a href=?account=2&transaction=621>2/05/2016</a></td>
	<td>Air Tickets Account</td><td></td><td align=right><input type='text' size=10 name='debitamount' value=$262.54></td><td>&nbsp;</td>
</tr>
<tr>
	<td align=center><input type="checkbox" name="transID"></td>
	<td><a href=?account=2&transaction=622>2/05/2016</a></td>
	<td>Air Tickets Account</td><td></td><td align=right><input type='text' size=10 name='debitamount' value=$262.54></td><td>&nbsp;</td>
</tr>
<tr>
	<td align=center><input type="checkbox" name="transID"></td>
	<td><a href=?account=2&transaction=662>5/05/2016</a></td>
	<td>Commission Transfer</td><td> </td><td align=right><input type='text' size=10 name='debitamount' value=$33.31></td><td>&nbsp;</td>
</tr>
<tr>
	<td colspan=4>TOTALS</td>
	<td align=right><input type="text" name="debittotal" size=10></td>
	<td align=right><input type="text" name="credittotal" size=10></td>
</tr>
<tr>
	<td colspan=4>Recon Amount</td>
	<td align=right><input type="text" name="amounttorecon" size=10></td>
	<td align=right><input type="text" name="totalrecon" size=10 placeholder="Total Recon Amount" disabled</td>
</tr>

Select allOpen in new window

So I would like the checked amounts to autosum into either debittotal or credittotal (which ever side they are)

Then it will sum to totalrecon

Cheers