How to make selected search criteria terms bold when we click on it for search

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C#

ASP.NET

CSS

C#4.0

Hello guys..

I am searching records on click on linkbutton and everything is working fine.but there are 3 search criteria



Filter By
Comment Type
All
Feature
Project
Entered By
Anyone
JohnFirstNameJoICenaLastLastLasI
Dfd
FichialinBarbos
testftest

Date Entered
All Time
<30> Days
<90> Days
<180> Days
<365> Days
>365 Days

now i can choose one-one value from each criteria.Suppose i select All,DFD,All Time and all three should be bold.Seaching is working fine but linkbutton are not getting bold.I use css to make them bold on click but as i click on other area on my page then linkbutton font goes normal.SO search item should be bold after click until i change the search criteria like....

example:::I select "ALL" from comment type it should be bold until i click on feature or Project because All three belong to same category.same for entered by and date entered.

example2..if i select all then it should be bold and again i click on "feature" then all should be normal and "feature" should be bold.and i choose entered by or date entered criteria then "feature" should be bold with value select in date entered and entered by criteria.

I hope my question is clear to you.Please provide me any effective solution for it
Thank and Regards
Rahul