Reindexing in mysql?

hai
i have a database with a table in my mysql..
what i had with my table is an AUTO_INCREMENTed index called "id".
See This structure of the table:

mysql> desc HV11;
+------------+---------------+------+-----+---------+----------------+
| Field | Type | Null | Key | Default | Extra |
+------------+---------------+------+-----+---------+----------------+
| id | int(11) | | PRI | 0 | auto_increment |
| ownerid | varchar(15) | | | | |
.....

After some time i delete some rows in the table...After that i want to reindex it ..Anybody please help me in solving this problem?

vijay