how to track only the changed values in the repeater asp.net
<p>I have a editable nested repeater containing the data.I use it for showing the data and also for saving the data which is updated by the user.
I want to detect particular cell/row for which the data has been modified by the user so that I can update only that particular row in the database instead of saving all the data again. 
Is there a way to work this out.Which would be the best technique to use ,Javascript or server side code ?</p>

<pre><code>Resource country etc |            Week1   Week2   Week3   | Total
ABC            XYZ                  10      15      20         45
</code></pre>

<p>This is the repeater structure.
Middle one (Weeks showing hours worked by resource which is editable) is the nested repeater.
Values can only be changed in the nested repeater.
I maintain unique ID's for each resource in the hidden field.</p>

<p>Can you suggest me some ways to achieve this functionlity ? </p>
