background color of table row

Question

I created a html table rows and columns dynamically in c# and then appended to table in asp.net.

I have  5 rows and 4 columns in a table and an hyperlink in a cell4.

 

When I click each link which is in cell 4, it highlights that row, which is exactly I want but when I click row 2 hyperlink the first row backround color turns off and it shows just 2nd row highlighted.

I wanted to keep the rows highlighted when I click(cell 4 hyperlink) as many as rows i want. 

 

Is there any way to keep the tablerows highlighted dynamically in c#?