highlight rows and make them clickable

[need2fart]

How can I make table rows highlight and clickable for forum categories and threads?

For mouse over rows I use:

td:hover {
background: #1f1f1f;
}

However, it only highlights sections of the row. tr:hover did not work on categories or threads. It did highlight other tables on the page.

How may I highlight entire rows and categories and ignore other tables on the page?

How would I be able to make the categories and thread rows clickable?