javascript table like form manipulation
<p>Basically I've got a form in a table. Each row of the table has some input fields.</p>

<p>For example:</p>

<pre><code>     col1  col2 
row1  A     C
row2  B     D
</code></pre>

<p>Some of the input fields depend on others. When I type something in A, B and C, D is locked, and its value is automatically filled by the calculation of A, B and C.</p>

<p>Also, the user can enter values into the fields in any order, and the one left is calculated.</p>

<p>Does anyone know if there's a jQuery/prototype plugin can do something like this?</p>
