I have this form, and I want to add JS to it. I got part of it. But the hard part is the ordering menu part it's self. Can someone help me please?
</p></td><td width="359" align="right"><table width="325">
<tbody>
<tr>
<th width="144">item</th>
<th width="75">price</th>
<th width="92">quantity</th>
<th width="101">sub-total</th>
</tr>
<tr align="middle">
<td align="left">Hamberger</td>
<td><input size="7" </td>
<td><input size="3" /></td>
<td><input size="10" /></td>
</tr>
<tr align="middle">
<td align="left">Cheeseburger</td>
<td><input size="7" value="$3.99" /></td>
<td><input size="3" /></td>
<td><input size="10" /></td>
</tr>
<tr align="middle">
<td align="left">Chicken Burger</td>
<td><input size="7" value="$4.99" /></td>
<td><input size="3" /></td>
<td><input size="10" /></td>
</tr>
</tbody>
</table>
<table width="324">
<tbody>
<tr>
<th width="124">item</th>
<th width="42">price</th>
<th width="72">quantity</th>
<th width="74">sub-total</th>
</tr>
<tr align="middle">
<td align="left">French Fries</td>
<td><input size="7" value="$2.99" /></td>
<td><input size="3" /></td>
<td><input size="10" /></td>
</tr>
<tr align="middle">
<td align="left"><input type="checkbox" />
gravy</td>
<td><input size="7" value="$0.50" /></td>
<td><input size="3" /></td>
<td><input size="10" /></td>
</tr>
<tr align="middle">
<td align="left"><input type="checkbox" />
chilli</td>
<td><input size="7" value="$1.99" /></td>
<td><input size="3" /></td>
<td><input size="10" /></td>
</tr>
</tbody>
</table>
<table align="right">
<tbody>
<tr>
<td>subtotal</td>
<td><input size="10" /></td>
</tr>
<tr>
<td>pst 7%</td>
<td><input size="6" /></td>
</tr>
<tr>
<td>gst 5%</td>
<td><input size="6" /></td>
</tr>
<tr>
<td>total</td>
<td><input size="10" /></td>
</tr>
<tr>
<td colspan="2"><input type="button" value="total up order" />
</td>
</tr>
</tbody>
</table></td>