Hi,
I suggest you to use jQuery
Selectors[
^] for that. You have many examples on net. Search for
http://bit.ly/GKgcOp[
^] or similar to get better results and from examples you will find solution.
If you can't solve it, just update your question with html that is generated from your asp.NET (only the part of html related to this problem, not whole html) code and I'll try to write selector for you. :)