C# - Accessing The DOM To Obtain Values From A HTML Table Server-Side

I created a aesthetic control that creates two lists in seperate div tags organized with a table for each. The control always the user to click on the img tag associated with each item to move it between the two lists. I am doing all the movement between the lists via javascript and want to have a good method for obtaining the values and storing them in two lists upon Postback. I thought of doing something like storing the indexes/classes in hidden values and them reading them to find the items but that seems messy. Also, thought there might be a clever way of traversing the DOM via FindControl() but not sure. Any input would be great.

One other thing is that this is not a composite control. All the tags are being rendered in the RenderContents() method. So I don't know if there is a way to even tack on a runat="server" attribute to an elem like I normally would if I wanted code behind access to an html element.

Here is the HTML that is generated. I don't think there is need to post the server side code since it does nothing more than generate the html at this point.

<div class="DualListPanel" id="test1">
<div key="test1_Unassigned">
<table class="DLPTable">
<tr>
<td>Item 1</td>
<td><img src="..." onclick="Move(this)" /></td>
</tr>
<tr>
<td>Item 2</td>
<td><img src="..." onclick="Move(this)" /></td>
</tr>
</table>
</div>
<div key="test1_Assigned">
<table class="DLPTable">
</table
</div>
</div>