hi,

is there a way to write a custom table header which takes into account grouped collumns? say i have colums like Input1, Input2, Input3, and Output1, Output2, which should be grouped by Inputs and Outputs. the table header should then have 2 rows and look like this:
_________________________________________
|________Inputs________|______Outputs_____|
| Input1 | Input2 | Input3 | Output1 | Output2 |

clicking at Inputs should select all Input collums, clicking on Input1 only Input1 ans so on.

does anyone have an idea how this could be done.

greetings.