Fancy Tables

[Diego A. Puertas F.]

Any one knows how to make a table like this:

+-------------------------------+
|         |  Over titles 2 & 3  |                              
|-------------------------------|
| title 1 | title  2 | title  3 |
|-------------------------------|
| data    | data     | data     |
| data    | data     | data     |
| data    | data     | data     |
+-------------------------------+


I have 2 lines of titles, in the first line there is a title over title 2
and 3; in other words, how can i join 2 cells of a table an have a result
like this table.